中药周围水蒸气的密度和压力小于空气中水气压力时产生的现象为()
A.平衡水分
B.安全水分
C.吸湿现象
D.风化现象
E.软化现象
参考答案:C
He has many friends at school, ________?[ ]
A. has he
B. does he
C. doesn't he
D. isn't he
右图告诉我们,作为中 * * 党应当
A.立党为公,执政为民
B.为民办一切事情
C.自觉接受民主监督
D.深入调查研究