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【简答题】
液体流经直径为 d的圆形截面管时,其水力半径为 ( ) ,如截面形状为边长等于 1的正方形时,其水力半径为 ( ) 。
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举一反三
【单选题】In my opinion, life in the twentyfirst century is much easier than ________. [ ]
A.
those used to be
B.
it is used to
C.
it was used to
D.
it used to be
【单选题】下列是关于字符数组的描述,错误的是( )。
A.
字符数组可以存放字符串
B.
字符数组中的字符串可以整体输入输出
C.
可以用关系运算符对字符数组中的字符串进行比较
D.
定义字符数组时，可以使用一个字符串对其初始化
【单选题】Nothing in my life has meant ____ to me as his praise. [ ]
A.
as much
B.
more
C.
that much
D.
as good
【单选题】In my opinion, life in the twentyfirst century is much easier than . [ ]
A.
that used to be
B.
it is used to
C.
it was used to
D.
it used to be
【单选题】In the last paragraph, by saying 'I would like to lunatic-proof my life as much as possible', one of the researchers interviewed by Joanna Kempner is suggesting that______.
A.
the personal life of the researchers might also be affected by their research.
B.
he doesn't want his life to be affected by the people who are mad.
C.
he would like the policeman to protect his life.
D.
his life is always in danger.
【单选题】下列是关于字符数组的描述,错误的是 ________ 。
A.
字符数组可以存放字符串
B.
字符数组中的字符串可以整体输入输出
C.
定义字符数组时，可以使用一个字符串对其初始化
D.
可以用关系运算符对字符数组中的字符串进行比较
【单选题】下列关于字符数组的描述中，错误的是。
A.
一维字符数组可以存放一个字符串
B.
二维字符数组可以存放多个字符串
C.
可以使用一个字符串给二维字符数组赋值
D.
可以用一个字符串给二维字符数组初始化
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