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【多选题】
如图所示,液压泵驱动两个串联液压缸工作。已知两缸结构尺寸相同,缸筒内径D=90mm,活塞杆直径d=60mm,负载力F1=F2=10000N,液压泵输出流量q=25L/min,不计损失,求泵的输出压力p及两液压缸的运动速度 、 。
A.
p=2.45MPa
B.
p=2.80MPa
C.
=0.066m/s; =0.036m/s
D.
=0.095m/s; =0.048m/s
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【判断题】甲壳虫文案是经典长文案。
A.
正确
B.
错误
【单选题】Dad,smoking is bad for your health.You’d better ________ .
A.
give up i t
B.
give it up
C.
give it back
D.
give back it
【多选题】在POWERPOINT 2010中,创建新演示文稿文件有以下哪种方式()。
A.
打开内置模板
B.
空演示文稿
C.
打开自定义模板
D.
打开已有的演示文稿
【单选题】--Smoking is bad for your health. --Yes,I know.But I simply can ’ t _____.
A.
4
B.
give it up
C.
give it in
D.
.give it out
E.
give it away
【单选题】— Smoking is bad for your health— Yes, I knowBut I simply can' t______.
A.
give it up
B.
give it in
C.
give it out
D.
give it away
【单选题】Boys, don' t lose _______ in playing computer games. It is bad for your eyes to play computer games for a long time.
A.
himself
B.
yourself
C.
themselves
D.
yourselves
【单选题】Boys, don‟t lost ______ in playing Angry Birds. It is bad for your eyes to play computer games for a long time.
A.
himself
B.
yourself
C.
themselves
D.
yourselves
【单选题】对建筑物和设备的基础下的受力层进行提高其强度和稳定性的强化处理称为( )
A.
地基处理
B.
边坡支护
C.
桩基工程
D.
平整场地
【单选题】如果要将PowerPoint演示文稿用IE浏览器打开,则文件的保存类型应为______。
A.
演示文稿    
B.
Web页
C.
演示文稿设计模板    
D.
PowerPoint放映
【单选题】--Smoking is bad for your health. --Yes,I know.But I simply can ’ t _____.
A.
give it away
B.
give it up
C.
give it in
D.
.give it out
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