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【单选题】
有关变频调速供水方式,说法错误的是( )。A.
水泵的转速随着管网压力的变化而变化
B.
可以节省水泵电能消耗
C.
变频调速为有级调速，水泵的启动为软启动
D.
可以确保管网压力恒定
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反馈参考答案：
举一反三
【单选题】在上团前,导游员应备齐所需物品,尤其是团队接待用品,更需仔细检查,避免遗漏。以下不属于团队接待用品的是 。
A.
接待任务书
B.
门票结算单
C.
预支团款
D.
导游旗（杆）
【简答题】根据 8*8 点阵编码编写出“中”和“人”十六进制编码?
【判断题】In the following two sentences, decide whether the underlined part in the first sentence is emphasized in the second sentence.1. He came to see ustwo years later.2. It was two years before he came to ...
A.
正确
B.
错误
【简答题】句子的结构类型与短语的结构类型有哪些不同之处？
【多选题】Which materials are not suitable for administrating of capsules?
A.
potassium chloride
B.
potassium bromide
C.
ammonium cholride
D.
highly efflorescent materials
E.
highly deliquescent materials
【简答题】阅读理解。 Friend is better than fortune. Friend is worse than poison in some cases. The two sentences above are opposite and seem to be unreasonable but they can be explained as follows: the first refers ...
【简答题】阅读理解。 Friend is better than fortune. Friend is worse than poison in some cases. The two sentences above are opposite and seem to be unreasonable but they can be explained as follows: the first refers ...
【简答题】Direction: Complete the following sentence with a proper word from your textbook on P. 74. Change the form if necessary. he two fighters had (adv.) boxed a 12-round match.
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