Do you think maths ______ useful subject_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

Do you think maths ______ useful subject? [ ]

A. is a

B. is an

C. are a

D. are an

答案

答案：A

单项选择题

不属于安全生产范畴的是（）。

A、发生工伤事故

B、自然灾害

C、职业病

D、设备或财产损失

单项选择题

This new method not only saves time but also saves energy（）operating on two batteries instead of four.

A.in

B.by

C.on

D.for