生石灰的化学分子式为()。
A.CaCO3
B.Cao
C.Ca(OH)2
参考答案:B
The little girl is not quite confident ______ her ability to go to a key university and she is very
sensitive _____ everything concerned with it.
[ ]
A. of; of
B. in; to
C. of; with
D. about; to
连续反复使用吗啡
A.可引起耐受性和依赖性B.只引起耐受性而无依赖性C.只引起依赖性而无耐受性D.只引起身体依赖性而无精神依赖性E.不会引起依赖性