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【单选题】
（）是低比转数离心泵的特点之一。A.
叶轮外径与叶轮吸入口直径之比较大
B.
叶轮出口宽度较大
C.
叶轮的叶片形状是扭曲形
D.
流量较大、扬程较低
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【简答题】以下关于人体测量尺寸的正确说法是 （ ）
【简答题】下列问句选择合适的答语。 ( ) 1. Was it thin? ( ) 2. Were they short,then? ( ) 3. Can you run fast? A. Yes, they were. B. No, it wasn't. C. Yes, I can.
【单选题】The ice was too thin for them ______. [ ]
A.
to skate on it
B.
skating on it
C.
to skate on
D.
skating on
【单选题】关于测量,正确的是( )。
A.
测量就是心理测量
B.
测量就是依据一定的法则用数字对事物加以确定
C.
测量就是用数字来描述事物的法则
D.
测量就是用一些题目或数字来描述事物的属性
【简答题】下列关于环境噪声现状测量的测量时段要求不正确的是（ ）。
【单选题】Henry found work in a bookstore after he finishedmiddle school. He wouldn’t do anything but wanted to get rich. Mr King thoughthe was too lazy and was going to send him away. Henry was afraid and had ...
A.
B.
C.
D.
D
【简答题】阅读理解 The first tape recorder didn't use tape. It used long thin wire. It was invented in 1900 by Valdermar Poulsen. In 1930, German scientists invented the tape we use today. Back then the tape was on...
【单选题】Edison had one suit ___very little money, and which he wore until it was thin.
A.
which cost
B.
which costs
C.
which was cost
D.
which has costed
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