Mary ____________fishing last Sunday. [

时钟5点整时，时针与分针之间的夹角是______度．

小明和妈妈逛商店，买了一件衣服用了134元，又买了一个书包用了108元，共用了多少钱？

The young fellow playing the violin had the misfortune to ________ two pages at once,   the music

went wrong as a result.  [      ]

A. turn off  

B. turn around

C. turn over  

D. turn up

预授权完成交易金额不得超过预授权金额的（）。

A.100%

B.115%

C.120%

D.150%

小蓟引子主治症的发病机理是什么？方中药物是如何配伍的？