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【单选题】
--Which bus shall I take to the zoo? -- ____________.A.
The bus six
B.
the six bus
C.
bus six
D.
bus number six
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举一反三
【单选题】The car was repaired but not quite to the owner's .
A.
attraction
B.
satisfaction
C.
pleasure
D.
complaint
【单选题】She didn’t want to marry him and was _____ against him because he had only a bachelor’s degree and didn’t meet her expectations for marriage.
A.
disliked
B.
disagreed
C.
dismissed
D.
prejudiced
【单选题】The car was repaired but not quite to the owner's ______.
A.
pleasure
B.
satisfaction
C.
joy
D.
attraction
【单选题】My sister ________ for long when she fell seriously ill.
A.
didn’t marry
B.
has been married
C.
hadn’t been married
D.
wasn’t married
【单选题】根据切削率知道凡满足切削率的任何工况点,都分布在 H=kQ2这条抛物线上,此线称为切削抛物线。实践证明在切削限度内,叶轮切削前后水泵效率变化不大,因此切削抛物线也称为( )
A.
等效率曲线
B.
管路特性曲线
C.
水泵效率曲线
D.
叶轮变径曲线
【简答题】我国是一个水资源短缺的国家，水资源的分布在时间和地区上极不平衡，水对我国而言是一种十分重要的资源，请回答下列问题： (1)天然水需经净化才能饮用，下面是自来水厂净水流程示意图： 其中常用的絮凝剂是 ① ，吸附剂一般用 ② 。自来水一般用少量的氯气来消毒，而氯气与水会发生反应：Cl 2 +H 2 O=HCl+HClO，若用自来水来配制50%氢氧化钠浓溶液，则会使配制的溶液溶质质量分数偏 ③ （填“大...
【单选题】She didn’t want to marry him and was ________ against him because he had only a bachelor’s degree and didn’t meet her expectations for marriage.
A.
preserved
B.
prejudiced
C.
protested
D.
predicted
【单选题】根据切削律知道凡满足切削律的任何工况点，都分布在H=kQ 2 这条抛物线上，此线称为切削抛物线。实践证明在切削限度内，叶轮切削前后水泵效率变化不大，因此切削抛物线也称为( )。
A.
等效率曲线
B.
管路特性曲线
C.
水泵效率曲线
D.
叶轮变径曲线
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