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【单选题】
在一个安装有离心泵的简单管路中,泵的流量为qV1,压头为H1;离心泵的出口阀,泵的流量变为qV2,压头变为H2。则管路的压头损失( )
A.
不变
B.
增加,增加量为 H2-H1
C.
减小,减小量为 H1-H2
D.
肯定有变化,但变化量无法确定
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举一反三
【单选题】Why did the fireman shout at Hong?
A.
Possibly because he wanted to save at least one more person.
B.
Possibly because he didn't want to save at least one more person.
C.
Possibly because Hong didn't wanted to save at least one more person.
D.
Possibly because they were in danger.
【单选题】She didn't like ______ at the poor man.
A.
he shouted
B.
his shouting
C.
him to shout
D.
that he should shout
【单选题】Why did the fireman shout at Hong Zhu?
A.
Because he himself wanted to be a hero.
B.
Because Hong looked too weak to help others.
C.
Because he didn't like Hong Zhu.
D.
Possibly because he wanted to save at least one more person.
【单选题】中小型直流机Z4-112/2-1,其中Z为直流电动机,4为( )
A.
第 4 次系列设计
B.
极数为4
C.
电枢铁心长度代号
D.
容量为4kW
【简答题】He didn't shout, he just g_____ at me silently.
【单选题】患者女,41岁。反复上腹疼痛10余年。因症状加重伴皮肤.巩膜黄染.畏寒.发热2天入院。查体:神志淡漠,体温39.5°C,脉搏125次/分,血压80/50mmHg。上腹压痛,肌紧张。实验室检查:白细胞计数23.5×109/L,中性粒细胞0.95。血清总胆红素209μmol/L。谷丙转氨酶310U/L。B超提示肝外胆管扩张,内有强光团伴声影。该患者发病的病理基础为
A.
胆囊功能失调
B.
胆道畸形
C.
胆道梗阻
D.
胆道扩张
E.
胆囊梗阻
【单选题】He didn't shout, he just ______________ at me silently.
A.
expanded
B.
glared
C.
objected
D.
lecture
【单选题】He was extremely angry, but he didn't shout, just ________ at me silently.
A.
glaring
B.
gazing
C.
peering
D.
glancing
【简答题】单词拼写。 1. It is very important to know your own strengths and w______. 2. He pushed against that big stone with all his s______. 3. After all these years we have paid off all our d______. 4. Chocolate ...
【简答题】根据汉语意思完成句子。 1.  他没有喊叫,只是沉默地怒视着她。 He didn't shout. He just ____  her silently. 2.  约翰盯着这个单词,努力想记起它的  意思。 John____the word trying to  remember its meaning. 3.  他扫视了一下会议室。 He ____ round the conference ro...
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