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【单选题】
某一系统工作阻力F 阻 =31.4KN,工作压力p=40×10 5 Pa,则杆活塞缸的活塞直径计算为:
A.
100 mm
B.
10 mm
C.
64 mm
D.
6.4 mm
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【单选题】芙蓉石的折射率高于____,摩氏硬度低于____。
A.
刚玉,萤石
B.
托帕石,刚玉
C.
萤石,托帕石
D.
月光石,磷灰石
【判断题】为使孔板前后沿圆周方向压力均匀,取得较正确的差压,在孔板设计中多采用环室取压。
A.
正确
B.
错误
【单选题】—John,where are the cookies? Dont tell me you ate them all. Again! —______I couldnt help it. They were so good.
A.
No,I didn't.
B.
Don't blame me.
C.
Yes,I did.
D.
Don't be angry.
【判断题】为使孔板前后沿圆周方向压力均匀,取得较正确的差压,因此在孔板设计中,多采用环室取压。
A.
正确
B.
错误
【简答题】Spot Dictation (P196) Santa Claus is also called simply Santa or Father Christma s. He is a fat, cheerful old man with a long white beard |(胡须)| who brings children their presents on Christmas Eve . S...
【简答题】以下程序段运行后的输出结果是 。int i,a[]={0,0,0,0,0};for(i=1;i<=4;i++){ a[i]=a[i-1]*2+1; printf("%d",a[i]);}
【单选题】The Federal Reserve buys Treasury Bills in the open market. This will tend to:
A.
decrease the price of treasury bills.
B.
increase the available for use funds with banks and dealers involved in the transaction.
C.
cause reserves held at the Federal Reserve to decrease.
D.
cause a decrease in the growth of deposits and loans.
E.
All of the options are correct.
【单选题】下列有关在Windows7下查找文件或文件夹的说法中,错误的是()。
A.
可以根据文件的位置查找
B.
可以根据文件的修改时间查找
C.
可以使用通配符查找
D.
不可以根据文件的部分内容查找
【单选题】下列有关在Windows 7下查找文件或文件夹的说法,不正确的是_____。
A.
可以根据文件的位置进行查找
B.
可以根据文件的属性进行查找
C.
可以根据文件的内容进行查找
D.
可以根据文件的修改日期进行查找
【单选题】The following except _________ are all powers of the President. A. vetoing any bills passed by Congress B. appointing federal judges when vacancies occur C. making laws D. issuing executive orders
A.
vetoing any bills passed by Congress
B.
appointing federal judges when vacancies occur
C.
making laws
D.
issuing executive orders
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