(神农本草经集注)的作者是
A．吴普
B．陶弘景
C．唐慎微
D．孙星衍
参考答案：B
Jim and Bob are my good _________.They are very _______ to me.
A．friends;friendly
B．friendly;friendly
C．friend;friendly
D．.friends;friend
喷射混凝土施工时，所用的速凝剂、其初凝时间不应超过（）
A.10min
B.15min
C.5min
D.3min
