意识反作用于物质必须具备的条件是指()。
A.意识是否正确
B.意识是否掌握群众
C.必要的物质手段
D.社会实践
E.意识是否具有主观性
参考答案:B, C, E
The ______ look on the student’s face suggested that your ______ question made him ______.
A.puzzling; puzzled; puzzled
B.puzzling; puzzling; puzzled
C.puzzled; puzzled; puzzling
D.puzzled; puzzling; puzzled
理想气体的等温压缩系数等于()
A.压力平方的倒数
B.压力的倒数
C.不是压力的倒数