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一条三相换位传输线，导线型号为铝绞线ACSR 1431000cmil，47/7Bobolink，导线水平排列，相间距为11m，如下面第一个图所示。导线的直径为3.625cm、GMR为1.439cm。现将导线用三分裂导线替换，型号为铝绞线ACSR 477000cmil，26/7Hawk，具有与导线相同的截面积，导线直径为2.1793cm，GMR为0.8839cm。新的传输线同样是水平排列，但传输电压等级更高，相间距也因此增加到14m，如第二个图所示，分裂间距为45cm。求：
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【简答题】编写Python程序,按下列要求完成操作。 输入字符串" http://sports.sina.com.cn/" ,输出以下结果: 1). 字符串中字母t出现的次数。 2). 字符串中"com"子字符串出现的位置。 3). 将字符串中所有的"."替换为"-"。 4). 提取"sports"和"sina"两个子字符串(分别使用正向切片和反向切片方式) 5). 将字符串中的字母全变为大写。 6). 输...
【单选题】The film is shot in black and white for the reason that the use of black and white ____________.
A.
can bring the audience an unforgettable effect
B.
can bring the audience the feeling of nostalgia
C.
is the good representation of the Holocaust itself
D.
can achieve a bad memory of the Holocaust
【单选题】The film is shot in black and white for the reason that the use of black and white ____________.
A.
can give the audience an unforgettable effect
B.
can give the audience the feeling of nostalgia
C.
is the good representation of the Holocaust itself
D.
can achieve a bad memoory of the Holocaust
【单选题】The film is shot in black and white for the reason that the use of black and white ____________.
A.
can give the audience an unforgettable effect
B.
can give the audience the feeling of nostalgia
C.
is the good representation of the Holocaust itself
D.
can achieve bad memory of the Holocaust
【简答题】编译过程的三个步骤编译、汇编、链接的功能分别是什么?
【单选题】The film is shot in black and white for the reason except that black and white ____________.
A.
can give the audience a special effect
B.
can give the audience the feeling of nostalgia
C.
is the good representation of the Holocaust itself
D.
can achieve special effect for the Holocaust
【单选题】What is the first shot in the film?
A.
A candle being lit
B.
A close-up of the bagpipes( 风笛 )
C.
The wall mural of boys Keating’s face
D.
The black and white pictures of boys
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