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【单选题】
(±) -乳酸为A.
内消旋体
B.
外消旋体
C.
顺反异构体
D.
互变异构体
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反馈参考答案：
举一反三
【单选题】How much rent should one pay for the one bedroom apartment? 查看材料
A.
＄350.
B.
＄400.
C.
＄415.
【简答题】How much will one pay per day he wants a shared room in May?
【单选题】How much rent should one pay for the one-bedroom apartment?
A.
$350.
B.
$400.
C.
$415.
【简答题】声音的三要素指的是( )、( )、( )。
【单选题】Why should one pay attention to e-business?
A.
Because one needs to follow the law of 'survival of the fittest'.
B.
Because one has surpassed the 'Knowledge Age'.
C.
Because one has entered the 'Information Age'.
D.
Because one has to get rid of the waste.
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