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【单选题】
Which statements are true， given the code new FileOutputStream（"data"， true） for creating an object of class FileOutputStream？（）A.
FileOutputStream has no constructors matching the given arguments.
B.
An IOExeception will be thrown if a file named "data" already exists.
C.
An IOExeception will be thrown if a file named "data" does not already exist.
D.
If a file named "data" exists， its contents will be reset and overwritten.
E.
If a file named "data" exists， output will be appended to its current contents.
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【简答题】PINs
【单选题】在进行原理图设计 ERC 编译时,系统提示“Floating Input Pins On Net NetU1_12”信息表示( )
A.
器件U1的第12脚没有连接输入信号
B.
器件U1含有悬浮的输入引脚 NetU1_12
【简答题】句型转换。 1. Their pen pals are from Singapore. (改为同义句) Their pen pals __________ __________ Singapore. 2. His aunt can speak English and French . (对划线部分提问) __________ __________ can his aunt speak? 3. Th...
【单选题】数组pins的定义如下:string[ ] pins = new string[4]{"a","b","c","d"}; 执行下列语句后,数组pins的值为 ( ) 。 string[ ] myArr = pins ; myArr [3] = "e";
A.
"a","b","e","d"
B.
"a","b","c","e"
C.
"a","b","c","d"
D.
"e","e","e","d"
【判断题】When a PAL is programmed, small fuses are blown open to allow connections between the input pins and the AND array.
A.
正确
B.
错误
【单选题】The diameters of both pins A and B are d, then the larger shearing stress for the two pins is .
A.
4bF/( a π d 2 )
B.
4( a + b )F/( a π d 2 )
C.
4( a + b )F/( b π d 2 )
D.
4 a F/( b π d 2 )
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