I think Chinese food is quite different ______ American food.
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Relative to stock exchanges, OTC stock markets do not: ()
A. trade a higher volume of securities.
B. trade a higher market value of securities.
C. trade a larger volume of U. S. Government bonds.
微分方程2yy"=(y')2的通解为______.
A. y=(x-c)2
B. y=c1(x-1)2
C. y=c1+(x-c)2
D. y=c1(x-c2)2
酸洗法主要适用于( )。
A. 对表面处理要求不高、形状复杂的零部件以及在无喷砂设备条件下的除锈场合
B. 大型金属表面的处理
C. 一些较小的物件表面及没有条件用机械方法进行表面处理的设备表面
D. 对表面处理要求不高、形状复杂的零件以及在干喷砂设备条件下的除锈场合
-- Why won't you go to the movie with me, Betty-- Because I ______ it twice.
A. saw
B. have seen
C. will see