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问题
填空题
请你写出一个单项式，使它的系数为﹣1，次数为3．答：( )（答案不唯一）
答案
﹣x
3
，﹣a
2
b，﹣xy
2
选择题
His sister is very young, but she draws ______ her brother.
A. as good as
B. as well as
C. so well as
D. as best as
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填空题
一般在纺化纤或纺粗特数纱时，滑溜槽应（）一些，以减小皮圈后部的控制力，防止牵伸力过大。
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