人体最重要的解毒器官是()
A.肝脏
B.肺
C.脾
D.胃
参考答案:A
—My pet dog is missing and I am feeling so sad.
—Take it easy. Liu Ying and I will help you ______ it.[ ]
A. look out
B. look after
C. look at
D. look for
选择电动机的额定电压等级要与电网电压()。
A.高
B.低
C.高或低
D.相等