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【多选题】
蓝片岩的典型特征矿物都有（ ）。A.
蓝闪石
B.
青铝闪石
C.
D.
普通角闪石
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反馈参考答案：
举一反三
【单选题】What does the telegram say?
A.
Return immediately for his parents missed him badly.
B.
Return immediately for his aunt is expecting him.
C.
Return immediately for something unusual happened at home.
D.
Return immediately for his uncle was seriously ill at home.
【简答题】发明了硫化橡胶。
【简答题】return o O是代表什么呢？如果不返回O 会怎么样？friend ostream& operator$amp for(int i=0 i o $amp } return o }
【单选题】What does the librarian imply when she tells the man to return at nine o'clock?
A.
She will see the man after work.
B.
The library probably closes at eleven.
C.
She is too busy to help the man now.
D.
Her supervisor will be there at that time.
【单选题】Based on the scenarios below, what is the expected return for a portfolio with the following return profile?______.
A.
4%
B.
10%
C.
0.2
D.
0.25
【多选题】变频空调; 在常规空调的结构上增加了一个变频器。变频器是用来控制和调整压缩机转速的控制系统,使之始终处于最佳的转速状态,从而提高能效比(比常规空调节能 20%-30% ).它的特点是: 1.制冷制热的速度比常规空调快
A.
启动电流小
B.
没有忽冷忽热的毛病
C.
噪声比常规空调低
D.
初投资少
【简答题】点的速度按规律v=v 0 +at变化．这个点在时间区间[0，T]经过多少路程？
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