痰热咳嗽，宜选用
A．半夏B．瓜蒌C．白芥子D．川贝母E．桔梗
参考答案：B
Much to my surprise, the eight-year-old boy fixed my computer within ten minutes．
A．skillfully
B．immediately
C．normally
D．nervously
接地线的最小截面不得小于（）mm2.
A.20
B.25
C.30
