搜题请搜索小程序“爱下问搜题”
问题 选择题

There is _____ with your computer. Why not have it _______?[ ]

A. nothing wrong; repaired

B. nothing wrong; repair

C. something wrong; to repair

D. something wrong; repaired

答案

答案：D

选择题

According to the United Nations, an aging society refers to one ____ 10 percent or more of the population is over 60, or 7 percent or more is over 65.   

A．where

B．when

C．which

D．that
查看答案
单项选择题

（）参与构成骨骼及牙齿，维持神经肌肉正常兴奋，参与凝血过程。

A、钙

C、锌

B、铁

D、碘
查看答案