设y=xcosx，求y’．
参考答案：y=xcosx，则 y’=cosx-xsinx．
I'll go to the same college ________ you. [ ]
A. to
B. as
C. for
D. that
巩膜占眼球表面的：
A．5/6B．3/6C．4/6D．2/6E．1/6
