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【单选题】
开动机床前须按要求部位注油,了解各操纵手轮及手柄的用途之后,以( )各机构的工作情况,必须用手转动机床主传动电动机轴,如果该轴能自由转动则可开动主传动电动机。
A.
全面了解
B.
检测仪检查
C.
全力检查
D.
手动检查
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【简答题】选用空气压缩机是依据气动系统所需的[填空(1)]和流量和一些特殊的工作要求。
【单选题】电力系统发生振荡时,各点电压和电流
A.
均作往复性摆动
B.
均会发生突变
C.
在振荡的频率高时会发生突变;
D.
不变
【简答题】Tom is the son of a farm owner. One New Year’s Day, when he was 15, his father asked him 36 on the farm for one year when he was free. Tom was 37 with his father’s idea.“That isn’t my job. I have 38 s...
【单选题】— Tom is waiting for you outside the building. — Oh!I thought he ________. [      ]
A.
went
B.
are going
C.
had gone
D.
have gone
【单选题】电力系统发生振荡时,各点电压和电流()
A.
均作往复性摆动
B.
均会发生突变
C.
电压摆动,电流不变
D.
均不变
【单选题】电力系统发生振荡时,各点电压和电流()
A.
均作往复性摆动
B.
均会发生突变
C.
在振荡频率高时会发生突变
D.
不变
【单选题】电力系统发生振荡时,各点电压和电流()
A.
均作往复性摆动
B.
均会发生突变
C.
在振荡的频率高时会发生突变
D.
瞬间增大
【简答题】朗读原文和译文: 原文: 吾见世间,无教而有爱,每1不能然2;饮食运为,恣 zì 其所欲,宜诫翻奖,应 反笑,至有识知,谓法当尔。骄慢已习,方复制之,捶挞 chuí tà 至死而无威,忿怒日隆而增怨,逮于成长,终为败德。孔子云:“少成若天性,习惯如自然”是也。俗谚曰:“教妇初来,教儿婴孩。”诚哉斯语! 重点字词:每——常常 然——认为......是对的 恣—— 任凭 翻——副词,反...
【单选题】电力系统发生振荡时,各点电压和电流
A.
均作往复性摆动
B.
均会发生突变
C.
在振荡的频率高时会发生突变
D.
之间的相位角基本不变
【单选题】听力原文:W: I thought Tom said he got an A in our history test. M: Mary, you should know better than to take Tom's words too seriously. Q: What does the man imply? (15)
A.
Tom is very responsible.
B.
Tom's words aren't reliable.
C.
What Tom said is true.
D.
Torn is not humorous at all.
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