第一章 单元测试
1、
Solids have a __________ shape and are not appreciably __________.
A:sharp, convertible
B:indefinite, compressible
C:indefinite, incompressible
D:definite, incompressible
E:definite, compressible
答案: definite, compressible
2、
The symbol for the element potassium is __________.
A:S
B:Ca
C:P
D:Pt
E:K
答案: K
3、
The