节肢动物的形态有几大特征：第一，身体为两侧对称；第二，节肢动物为三胚层，中胚层和内胚层之间是真正的体腔；第三，节肢动物有外骨骼，并且在其上发育坚硬的角质层。第四，节肢动物的循环系统发达；第五，节肢动物的附肢非常多样化。答案: 正确 | 萌面人

节肢动物的形态有几大特征：第一，身体为两侧对称；第二，节肢动物为三胚层，中胚层和内胚层之间是真正的体腔；第三，节肢动物有外骨骼，并且在其上发育坚硬的角质层。第四，节肢动物的循环系统发达；第五，节肢动物的附肢非常多样化。答案: 正确

语演讲艺术0120192西安交通大学mooc慕课答案2026年版 Read an

节肢动物的形态有几大特征：第一，身体为两侧对称；第二，节肢动物�
��三胚层，中胚层和内胚层之间是真正的体腔；第三，节肢动物有外骨骼，并且在其上发育坚硬的角质层。第四，节肢动物的循环系统发达；第五，节肢动物的附肢非常多样化。

答案: 正确

本门课程完整答案：点击这里，查看《古生物学及地史学(中南大学) 》mooc慕课答案2026年版

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计算机中运算器的主要功能是进行（ ）。 A:算术运算 B:逻辑运算 C:算术和逻辑运算 D:函数运算 答案: 算术和逻辑运算

腕足动物分为无铰类和有铰类，无铰类就是没有铰齿和铰窝，两瓣壳靠肌肉闭合在一起，所以肌肉系统复杂，有腕骨。 答案: 错误

专题4：软体动物 专题4-头足-双壳-腹足单元测试

软体动物门包含的类群很多，并且看起来五花八门，我们常见的有：蜗牛属于腹足动物，鱿鱼属于（），扇贝属于双壳动物。 答案: 头足动物

软体动物的（）是紧贴贝壳的软质膜，包被在内脏团之外，分泌钙质，形成外部的壳体，也就是外骨骼。有些特殊的类群这个结构还会分泌漂亮的珍珠层，包被核心形成珍珠。 答案: 外套膜

我们通常所说的”瑶柱”，就是海扇类的（）。 答案: 闭壳肌

以下常见海鲜中，哪项不属于双壳类？ 答案: 鲍鱼

某种双壳动物的壳体偏长形，具有比较长的进出水管，推断它的生活方式为（）。 答案: 深埋生活

鹦鹉螺是软体动物里的（）。 答案: 活化石

戒烟门诊的医生指导戒烟过程中会病人，在戒烟后一段时间内可能会出现浑身难受心烦意乱咳嗦咳痰等症状，戒烟后也会出现呼吸道通畅牙齿变白体味减少等，基于HBM理论的（ ）思路 答案: 【行为评价】

下述程序创建了一个数据框。程序最后的显示结果是( )import numpy as np import pandas as pd t=np.arange(1，10，2) x=t**2 mydict={‘t’:t，’x’:x} mydf=pd.DataFrame(mydict) np.sum(mydf.x) A:165 B:385 C:220 D:50 答案: 165

头足动物的壳内被分割为多个壳室，和有孔虫类似，最后的一个壳室通常较大，是软体居住的地方，称为（）。 答案: 住室

国际上对计算机进行分类的依据是（ ）。 A:计算机的型号 B:计算机的速度 C:计算机的性能 D:计算机生产厂家 答案: 计算机的性能

下列生物全属于腹足纲的是（）。 答案: 蜗牛蛞蝓鲍

肺螺亚纲的类群在陆地或者淡水生活，其特点为（）。 答案: 没有鳃，但外套腔的表面富含血管，可供呼吸

（）为后直蛏。 答案:

Which of the following item matters most to a public speaker? A:Pronunciation. B:Language proficiency. C:Critical thinking skill. D:Inherent talent. 答案: Critical thinking skill.

Both the speaker of a casual conversation and that of a public speech need to _________. A:use formal language. B:organize their thoughts logically. C:structure the content highly. D:be self-centered. 答案: organize their thoughts logically.

WEEK 1 Unit 2 Testing

下述哪行程序没有生成正态分布的随机数？ ‍ ( ) A:x=np.random.normal(10，2，5) B:x=np.random.normal(2，5，[5，2]) C:x=np.random.normal(2，5，[2，5]) D:x=2+5*np.random.randn(10) 答案: x=np.random.normal(10，2，5)

Public speaking anxiety is a sign of psychological weakness. A:正确 B:错误 答案: 错误

在计算机应用领域里，（ ）是其最广泛的应用方面。 A:过程控制 B:科学计算 C:数据处理 D:计算机辅助系统 答案: 数据处理

You look more nervous to your audience than you actually feel. A:正确 B:错误 答案: 错误

With proper training， public speaking anxiety can be reduced. A:正确 B:错误 答案: 正确

The more familiar you are with your speech， the less nervous you may feel. A:正确 B:错误 答案: 正确

One should memorize every sentence of his or her speech. A:正确 B:错误 答案: 错误

WEEK 2 Unit 3 Testing

Choose a topic that you have been studying for years， one about which you could give a speech without any discomfort. This is the best way to acclimate yourself to public speaking within your moral and academic arena. A:正确 B:错误 答案: 正确

You may choose a topic which you have some knowledge but not enough to prepare a speech without further research. A:正确 B:错误 答案: 正确

Read and copy the Internet and professional publications to learn about the latest developments in the area you will discuss. A:正确 B:错误 答案: 错误

Most of the time， the best way to approach topic selection is to pick a single unifying message that you want to deliver and then scour your brain for amazing experiences that add emotional depth to the logical argument of your message. A:正确 B:错误 答案: 正确

When you have a real message in your head or heart – an inner urge to speak- you are almost sure to do yourself credit. A:正确 B:错误 答案: 正确

WEEK 2 Unit 4 Testing

十进制数215用二进制数表示是（ ）。 A:1100001 B:1101001 C:0011001 D:11010111 答案: 11010111

Which of the following features the most common structure of a speech? A:Topic， theme and main points. B:Concept， illustration and example. C:Introduction， body and conclusion. D:Beginning， climax and ending. 答案: Introduction， body and conclusion.

Which of the following is essential before you move into the body of your speech? A:Amusing the audience. B:Controlling your emotions. C:Building suspense. D:Previewing the main points. 答案: Previewing the main points.

Which of the following patterns is most frequently used to organize the main points in a speech? A:Topical pattern. B:Chronological pattern. C:Spatial pattern. D:Problem-solution pattern. 答案: Topical pattern.

If you want to show how the occurrence of one thing is a direct result of another thing， which pattern is probably the most effective? A:Problem-solution pattern. B:Cause-and-effect pattern. C:Topical pattern. D:Chronological pattern. 答案: Cause-and-effect pattern.

Which of the following is essential before you end your speech? A:To call for actions. B:To appeal to audience’s emotions. C:To review the main points or central idea. D:To remind the audience the importance of the topic. 答案: To review the main points or central idea.

WEEK 3 Unit 5 Testing

1. Gaining the audience attention is the most fundamental function of an introduction. A:正确 B:错误 答案: 正确

2. A speaker can establish his or her credibility by quoting from an expert. A:正确 B:错误 答案: 正确

3. A rhetorical question expects immediate verbal response from the audience. A:正确 B:错误 答案: 错误

4. A speaker needs to make an apology when he or she doesn’t behave very confidently. A:正确 B:错误 答案: 错误

5. Greeting the audience in the beginning of a speech may help the speaker release from stage fright. A:正确 B:错误 答案: 错误

WEEK 3 Unit 6 Testing

在微型计算机中应用最普遍的字符编码是（ ） A:ASCII码 B:BCD码 C:汉字编码 D:补码 答案: ASCII码

下述哪个命令不能实现普通最小二乘回归？( ) A:statsmodels.api.OLS() B:statsmodels.formula.api.ols() C:numpy.linalg.lstsq() D:pandas.formula.api.ols() 答案: pandas.formula.api.ols()

Which of the following belongs to the general types of speech?

Choose the right statement 答案: Innovation practice is not high risk， and there is innovation spirit in all fields and industries.

Choose the wrong statement 答案: John sees his cousin make a lot of money selling three no masks. He thinks that under this special epidemic period， it would be lucky to have masks. This is a rare opportunity to start a business.

计算机中运算器的主要功能是进行（）。

A:算术运算
B:逻辑运算
C:算术和逻辑运算
D:函数运算
答案: 算术和逻辑运算

腕足动物分为无铰类和有铰类，无铰类就是没有铰齿和铰窝，两瓣壳靠肌肉闭合在一起，所以肌肉系统复杂，有腕骨。

答案: 错误

专题4：软体动物专题4-头足-双壳-腹足单元测试

软体动物门包含的类群很多，并且看起来五花八门，我们常见的有：蜗牛属于腹足动物，鱿鱼属于（），扇贝属于双壳动物。

答案: 头足动物

软体动物的（）是紧贴贝壳的软质膜，包被在内脏团之外，分泌钙质，形成外部的壳体，也就是外骨骼。有些特殊的类群这个结构还会分泌漂亮的珍珠层，包被核心形成珍珠。

答案: 外套膜

我们通常所说的”瑶柱”，就是海扇类的（）。

答案: 闭壳肌

以下常见海鲜中，哪项不属于双壳类？

答案: 鲍鱼

某种双壳动物的壳体偏长形，具有比较长的进出水管，推断它的生活方式为（）。

答案: 深埋生活

鹦鹉螺是软体动物里的（）。

答案: 活化石

戒烟门诊的医生指导戒烟过程中会病人，在戒烟后一段时间内可能会出现浑身难受心烦意乱咳嗦咳痰等症状，戒烟后也会出现呼吸道通畅牙齿变白体味减少等，基于HBM理论的（）思路

答案: 【行为评价】

下述程序创建了一个数据框。程序最后的显示结果是( )import numpy as np
import pandas as pd
t=np.arange(1，10，2)
x=t**2
mydict={‘t’:t，’x’:x}
mydf=pd.DataFrame(mydict)
np.sum(mydf.x)

A:165
B:385
C:220
D:50
答案: 165

头足动物的壳内被分割为多个壳室，和有孔虫类似，最后的一个壳室通常较大，是软体居住的地方，称为（）。

答案: 住室

国际上对计算机进行分类的依据是（）。

A:计算机的型号
B:计算机的速度
C:计算机的性能
D:计算机生产厂家
答案: 计算机的性能

下列生物全属于腹足纲的是（）。

答案: 蜗牛蛞蝓鲍

肺螺亚纲的类群在陆地或者淡水生活，其特点为（）。

答案: 没有鳃，但外套腔的表面富含血管，可供呼吸

（）为后直蛏。

答案:

Which of the following item matters most to a public speaker?

A:Pronunciation.
B:Language proficiency.
C:Critical thinking skill.
D:Inherent talent.
答案: Critical thinking skill.

Both the speaker of a casual conversation and that of a public speech need to _________.

A:use formal language.
B:organize their thoughts logically.
C:structure the content highly.
D:be self-centered.
答案: organize their thoughts logically.

下述哪行程序没有生成正态分布的随机数？ ‍ ( )

A:x=np.random.normal(10，2，5)
B:x=np.random.normal(2，5，[5，2])
C:x=np.random.normal(2，5，[2，5])
D:x=2+5*np.random.randn(10)
答案: x=np.random.normal(10，2，5)

Public speaking anxiety is a sign of psychological weakness.

A:正确
B:错误
答案: 错误

在计算机应用领域里，（）是其最广泛的应用方面。

A:过程控制
B:科学计算
C:数据处理
D:计算机辅助系统
答案: 数据处理

You look more nervous to your audience than you actually feel.

A:正确
B:错误
答案: 错误

With proper training， public speaking anxiety can be reduced.

A:正确
B:错误
答案: 正确

The more familiar you are with your speech， the less nervous you may feel.

A:正确
B:错误
答案: 正确

One should memorize every sentence of his or her speech.

A:正确
B:错误
答案: 错误

Choose a topic that you have been studying for years， one about which you could give a speech without any discomfort. This is the best way to acclimate yourself to public speaking within your moral and academic arena.

A:正确
B:错误
答案: 正确

You may choose a topic which you have some knowledge but not enough to prepare a speech without further research.

A:正确
B:错误
答案: 正确

Read and copy the Internet and professional publications to learn about the latest developments in the area you will discuss.

A:正确
B:错误
答案: 错误

Most of the time， the best way to approach topic selection is to pick a single unifying message that you want to deliver and then scour your brain for amazing experiences that add emotional depth to the logical argument of your message.

A:正确
B:错误
答案: 正确

When you have a real message in your head or heart – an inner urge to speak- you are almost sure to do yourself credit.

A:正确
B:错误
答案: 正确

十进制数215用二进制数表示是（）。

A:1100001
B:1101001
C:0011001
D:11010111
答案: 11010111

Which of the following features the most common structure of a speech?

A:Topic， theme and main points.
B:Concept， illustration and example.
C:Introduction， body and conclusion.
D:Beginning， climax and ending.
答案: Introduction， body and conclusion.

Which of the following is essential before you move into the body of your speech?

A:Amusing the audience.
B:Controlling your emotions.
C:Building suspense.
D:Previewing the main points.
答案: Previewing the main points.

Which of the following patterns is most frequently used to organize the main points in a speech?

A:Topical pattern.
B:Chronological pattern.
C:Spatial pattern.
D:Problem-solution pattern.
答案: Topical pattern.

If you want to show how the occurrence of one thing is a direct result of another thing， which pattern is probably the most effective?

A:Problem-solution pattern.
B:Cause-and-effect pattern.
C:Topical pattern.
D:Chronological pattern.
答案: Cause-and-effect pattern.

Which of the following is essential before you end your speech?

A:To call for actions.
B:To appeal to audience’s emotions.
C:To review the main points or central idea.
D:To remind the audience the importance of the topic.
答案: To review the main points or central idea.

1. Gaining the audience attention is the most fundamental function of an introduction.

A:正确
B:错误
答案: 正确

2. A speaker can establish his or her credibility by quoting from an expert.

A:正确
B:错误
答案: 正确

3. A rhetorical question expects immediate verbal response from the audience.

A:正确
B:错误
答案: 错误

4. A speaker needs to make an apology when he or she doesn’t behave very confidently.

A:正确
B:错误
答案: 错误

5. Greeting the audience in the beginning of a speech may help the speaker release from stage fright.

A:正确
B:错误
答案: 错误

在微型计算机中应用最普遍的字符编码是（）

A:ASCII码
B:BCD码
C:汉字编码
D:补码
答案: ASCII码

下述哪个命令不能实现普通最小二乘回归？( )

A:statsmodels.api.OLS()
B:statsmodels.formula.api.ols()
C:numpy.linalg.lstsq()
D:pandas.formula.api.ols()
答案: pandas.formula.api.ols()

Choose the right statement

答案: Innovation practice is not high risk， and there is innovation spirit in all fields and industries.

Choose the wrong statement

答案: John sees his cousin make a lot of money selling three no masks. He thinks that under this special epidemic period， it would be lucky to have masks. This is a rare opportunity to start a business.