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【单选题】
已知均匀磁场的磁感应强度B是0.8T，直导体的有效长度10cm导体在垂直于磁力线方向上运动的速度是V=10m/s，直导体上的感应电动势应为()。A.
80V
B.
8V
C.
0.8V
D.
0.08V
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【单选题】Which of the following is a pair of converse antonyms ? A. Old: young. B. Dead: alive. C. Older: younger. D. Good: bad. 2. The letter “ n ” in the word ten is pronounced as [ten] while in the word ten...
A.
1-5 CBACA 6-10 DBCBC 1. C
B.
2. B
C.
3. A
D.
4.C
【单选题】关于文件,下列说法中错误的是:
A.
对已经关闭的文件进行读写操作会默认再次打开文件
B.
对文件操作完成后即使不关闭程序也不会报错,所以可以不关闭文件
C.
对于非空文本文件,read()返回字符串,readlines()返回列表
D.
file=open(filename,'rb')表示以只读、二进制方式打开名为filename的文件
【单选题】关于文件,下列说法中错误的是
A.
对已经关闭的文件进行读写操作会导致ValueError 错误。
B.
对文件操作完成后即使不关闭程序也不会报错,所以可以不关闭文件。
C.
对于非空文本文件,read()返回字符串,readlines()返回列表。
D.
file = open(filename, ‘rb’)表示以只读、二进制方式打开名为fileName的文件。
【单选题】When I was younger I ______ long distance, but now I'm out of practice.
A.
was used to walk
B.
got used to walk
C.
was used to walking
D.
used to walking
【单选题】关于文件 , 下列说法中错误的是
A.
对已经关闭的文件进行读写操作会导致 ValueError
B.
对文件操作完成后即使不关闲程序也不会报错，所以可以不关闭文件
C.
对于非空文本文件， read() 返回字符串， readlines() 返回列表
D.
file=open(filename , ’ rb’ ) 表示以只读、二进制方式打开名为 filename 的文件
【简答题】( ) 1 She saw____ English film last Sunday. But she can not remember. name of ___ film. A. an; a; a B. a; the; a C. an; the; a D. an; the; the ( ) 2 There is___ old man under___ tree. A. an; the B. th...
【单选题】104 A network has been developed with resources from six different departments. One of the six departments has just informed you that they can increase the number of employees from 5 to 8. This will r...
A.
A shortening of the critical path.
B.
A shortening of the noncritical path.
C.
A decrease in the total cost of the project.
D.
An increase in the cost of the project.
E.
A through D are possible based upon where the resources are deployed
【简答题】阅读理解。 Handshaking, though a European practice, is now often seen in big cities of China. Nobody knows exactly when the practice started in Europe. It is said that long long ago in Europe when people m...
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