He even _________ a Beijing Opera artist. [ ]
A.want to be
B.wants to be
C.is want
答案:B
计算:(﹣2ab2)3(3a2b)2+4a3b218a4b6=( ).
可增强子宫收缩力的吸入麻醉药是()
A.氧化亚氮
B.乙醚
C.氟烷
D.异氟烷
E.恩氟烷