2. 专升本
  3. Primary batteries of cells are those that, once ______, are discarded.

Primary batteries of cells are those that, once ______, are discarded.

admin2020-09-23  8
问题 Primary batteries of cells are those that, once ______, are discarded.
选项 A、to be discharged
B、being discharged
C、discharged
D、discharging
答案C
解析 本题为语法结构题，考分词结构。过去分词短语 once discharged 表示被动，相当于从句 once they are discharged，用作状语。本句大意为：最初的电池放电之后就被丢弃了。
转载请注明原文地址:https://kaotiyun.com/show/Xr4C777K
本试题收录于： 英语题库成考专升本分类
0

英语

成考专升本

相关试题推荐
随机试题
最新回复(0)