单项选择题1、Take your vaccination certificate with you( )they ask for it at the airport.
A.unless
B.in case
C.when
D.because of
2、
Only if you work hard every day __ pass the exam.
A.
you can
B.
may you
C.
you must
D.
must you
填空题3、
清减了小腰围。
4、
5、
简答题6、
7、
8、设函数y=y(x)由方程y+arcsinx=e
x+y确定。求dy.
9、
10、
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