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【多选题】
在电源电路中( )元器件要考虑重量散热等问题,应安装在底座上和通风处。A.
. 电解电容器、变压器、整流管等
B.
. 电源变压器、调整管、整流管等
C.
. 保险丝、电源变压器、高功率电阻等
D.
电源变压器、调整管、晶体管
E.
以上答案都不对
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】PCR样品制备时应注意( )
A.
应有专门的区域制备模板
B.
提取DNA样品和RNA样品时要带手套且经常更换
C.
纯化样品对污染有极大的影响
D.
普通分子克隆工具不能用做样品的处理和靶序列
E.
提取核酸所用的试剂要求新鲜配制或者适当储存未经使用的试剂.
【简答题】Do you wish to enter a summer school of English in Britain? Here are some tips(指导). Most summer school courses in Britain last for two to four weeks. During that time, students live either with a Brit...
【单选题】听力原文：W: You wouldn't be interested in working this summer to make some extra money, would you? M: Not much I wouldn't. What does the man mean?
A.
He is interested in working this summer.
B.
He will work part-time this summer.
C.
He' 11 work even though he doesn' t want to.
D.
He doesn't need much money.
【单选题】听力原文：W：You wouldn't be interested in working this summer to make some extra money，would you? M：Not much，1 wouldn't．And this summer I have a vacation plan． Q：What does the man mean? (19)
A.
He is not very interested in working.
B.
He'll work even though he doesn't want to.
C.
He doesn't need much money.
D.
He could only work part of the summer.
【简答题】指出下列命题中,哪些是简单命题,哪些是复合命题。 (1) 李明是一个百米跑冠军和跳远冠军。 (2) 派黄金或赵顺去美国留学。 (3) 格林和比尔都是大学生。 (4) 格林和比尔是同学。
【单选题】— Where ______ go this summer ? — I'd like to go ______ warm. [ ]
A.
would you like to; some where
B.
will you like to; anywhere
C.
would you like to; somewhere
D.
will you like to; somewhere
【多选题】在中国特色社会主义新时代,保障和改善民生主要表现在( )。
A.
优先发展教育事业
B.
提高就业质量和人民收入水平
C.
加强社会保障体系建设
D.
坚决打赢脱贫攻坚战
E.
实施健康中国战略
【简答题】You and some of your classmates decide to go for an outing to the Summer Palace during the National Day holidays. As the organizer, you are to write an email message to remind the others of: 1) when a...
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