若()。
A.arctanex+C
B.
C.arctane2x+C
D.2arctanex+C
参考答案:A
解析:
,故选A。
同上。
用括号里所给词的适当形式填空。每空一词。
小题1:I don’t like the film Tiny Times 2. It makes me __________(sleep).
小题2: The binoculars will help you see the birds more ___________(clear).
小题3:The man was so worried because his son had a terrible ___________(ill).
小题4:It’s really ___________ (excite) to watch the show “Dad! Where Are We Going?”.
小题5:To prevent overfishing(过度捕捞), ___________(fisherman) stop fishing for a month every year.
激情是一种( )的情绪状态。
A.爆发式
B.危险情况下出现
C.强烈
D.持续时间较短