My brother _____ a small car.A. there is_爱下问搜题

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问题选择题

My brother _____ a small car.

A. there is
B. there are
C. have
D. has

答案

答案：D

填空题

如果6a=5b，那么a：b=______：______，a：5=______：______．

判断题

采用电弧焊时，电流大小的调整取决于工件的厚度。