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【单选题】
若离心泵的转速变化小于 ± 20% 时,泵的压头与叶轮转速的 ________ 成正比。
A.
一次方
B.
二次方
C.
三次方
D.
二分之一次方
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参考答案:
举一反三
【简答题】Language Frames (语言框架): Wh at's the weather like in...? It’s... (1) 请你尝试用 相应 的句型,说一说。 ( 2 ) 读一读下面的句子,看看你刚刚说的是否相同。 Wh at's the weather like in Heilongjiang? It’s snowy. Wh at's the weather like in Liao...
【简答题】句型展示台。 1. — ______ ______ ______ ______ in autumn? —It's cool. 2. —What's the weather like in winter? —It's ______ .
【单选题】It's ____________ and cool. [     ]
A.
rain
B.
rainy
【单选题】– Oh, the box is too heavy. – ( ).
A.
What's in it
B.
Can I help you to carry it
C.
Whose is it
D.
May I have a try
【单选题】下列哪一个因素与越岭隧道平面位置的选择关系不大。
A.
线路总方向
B.
车辆类型
C.
地质条件
D.
隧道长度
【简答题】现代汉语11舌面元音的发音特征是什么?
【单选题】—Are you still thinking about yesterday's game?—Oh, that's
A.
what makes me feel excited
B.
whatever I feel excited about
C.
how I feel about it
D.
when I feel excited
【简答题】在旅游活动中,对旅游者的称呼总的原则应把握三点:一要( ),二要尊重,三要通用。
【单选题】—What's this? —______. [     ]
A.
It's an eraser.
B.
He's cool.
C.
Yes, it is.
【单选题】— What's the weather like today? — _________. [     ]
A.
It's Sunday.
B.
It's summer.
C.
It's cool.
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