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【单选题】
,为了防止振动,主偏角一般为( )。A.
45度
B.
60~75度
C.
30度
D.
90度
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反馈参考答案：
举一反三
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A.
/; a
B.
the; the
C.
the; a
D.
a; a
【简答题】高级语言编写的程序称为源程序,必须要经过翻译生成机器指令。翻译的方式有编译和 。
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【简答题】将中缀表达式5-2*(20-(3+4))/2,转换为后缀表达式,并写出转换过程中栈的变化。
【单选题】Some people argue using _______ nature to meet our own needs may spell disaster, unless we start to look around and understand how _________ clean environment benefits us all.
A.
the; a
B.
the; the
C.
/; a
D.
a; a
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