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- 1They wore ____excited to say ____.
- 2碘(l2)属于 A.混合物 B.化合物 C.金属单质 D.非金属单质
- 3已知a是实数,函数f(x)=2ax²+2x-3-a,如果y=f(x)在区间[-1,1]上有零点,求a的取值范围.
- 4翻译:Many students coming out of college are more interested in a customer's motivation than they are in closing a sale.
- 5求问外语的动名词做主语怎么判断是+ing还是用 to do
- 6I'll look after your baby carefully.(改同义句)
- 7(1)求正整数列前n个偶数的和 (2)求正 整数列前n个奇数的和 (3)在三位正整数的集合中有几个
- 8Our classroom is on the second floor.Theirs is d____.
- 9显微镜中,接近玻片标本的镜头是( )
- 10“之”在古文中有哪些用法?