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【单选题】
John ________ his little dog as his best friend in his life. [ ]A.
view
B.
views
C.
looks
D.
when
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举一反三
【简答题】全国的环保举报热线号码是什么?哈尔滨市环境保护的环保举报热线号码是什么?
【单选题】---Have we ________ food?. --- Yes, ______. We’d better buy some.
A.
run out of; we have run it out
B.
run out of; our food has run out
C.
run out; our food has been run out
D.
run out; our food has run out
【单选题】全国的环保举报热线号码是( ),哈尔滨市环境保护的环保举报热线号码是( )。
A.
12369 12315
B.
12315 12123
C.
12315 12315
D.
12369 12369
【简答题】环境保护举报热线是
【单选题】With regard to food, what fo people in advanced societies have in common with promitive people?
A.
They have the same need for food.
B.
They need the same kind of food.
C.
Their food is of the same kind.
D.
They grow the same kind of food.
【单选题】下列说法正确的是（ ）。
A.
管路的压头和流量取决于泵的扬程和流量
B.
泵的设计点即泵在指定管路上的工作点
C.
泵只能在工作点下工作
D.
改变离心泵工作点的常用方法是改变转速
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