搜题请搜索小程序“爱下问搜题”
问题 单项选择题

关于直流电源的自测，以下说法正确的是（）。

A.必须将直流电表选择电门置于“TEST”位

B.必须将交流电表选择电门置于“TEST”位

C.必须按压“AMINT”电门

D.A+B+C

答案

参考答案：D

单项选择题

（）是指床层中分选重产物透过粗粒物料层和筛板排入跳汰机下部机体内的过程。

A、筛上排料装置

B、溢流堰排料

C、筛下排料装置

D、透筛排料
查看答案
填空题
从方框中选择合适的短语，并用其适当的形式填空。
take one's life; calm down; be pleased with;
play the roleof; at the end of; stay still

1. Teachers _____ the grades of the students in the final exam.
2. The first thing you must do is _____ when you meetsome difficulties.
3. _____ in the comer of the room, or you'll be pun-ished.
4. The 60-year-old hunter came and _____ the tiger's _____.
5. _____ lie road, they found the post office.
6. Would you please say more about the actress who _____ Juliet?
查看答案