Children who stay away from school do______for different reasons.
A. them
B. that
C. it
D. theirs
设y=f(x)是满足微分方程y〞+yˊ-esinx=0的解,且fˊ(xo)=0,则f(x)在().
A. xo的某个邻域内单调增加
B. xo的某个邻域内单调减少
C. xo处取得极小值
D. xo处取得极大值
Built in seventeenth century, the ruined temple is tucked ______ in the pine-covered mountains.
A. in
B. away
C. off
D. on
Tourist; How much is that ring, please?
Vendor; Only $200, sir.
Tourist: _____ How about $ 100?
Vendor; I can let you have it for $ 180.
All right. I' 11 take it.
B. That’s very expensive.
C. How splendid it is!
D. I’d like very much to have it.