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【多选题】
由基本音级构成的音程称为基本音程,根据音程的音数,可以把基本音程分为纯音程、( )五种。A.
大音程
B.
小音程
C.
增音程
D.
减音程
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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
【简答题】已知点A的坐标是（4，-2），以A为圆心作圆．若⊙A上有且只有两点到x轴的距离为1，则⊙A的半径r的取值范围是______．
【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
【简答题】项目按照所处阶段的预算分类包括
【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.
【简答题】如图，从圆O外一点A引圆的切线AD和割线ABC，已知AD=2 3 ，AC=6，圆O的半径为3，则圆心O到AC的距离为______．
【简答题】如图，从圆O外一点A引圆的切线AD和割线ABC，已知 AD=4 2 ，圆O的半径r=AB=4，则圆心O到AC的距离为______．
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