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【单选题】
预防未成年人犯罪应立足于( )。
A.
教育和处罚
B.
教育和保护
C.
保护和管教
D.
预防和惩戒
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【单选题】What does she look like? [     ]
A.
She is well.
B.
She is good.
C.
She is tall.
D.
She likes her.
【单选题】以下哪种物质在PCR反应中不需要
A.
Taq DNA聚合酶
B.
dNTPs
C.
引物
D.
RNA酶
E.
合适的PH缓冲液
【简答题】Elounda Co manufactures chemical compounds using a continuous production process. Its year end was 31 July 20X6 and the draft profit before tax is $13·6 million. You are the audit supervisor and the y...
【单选题】McGuire proposed Labor Day in order to ______.
A.
draw people's attention to the striking contrast between the rich and the poor
B.
make prominent the important role of the working class in society
C.
win for the workers the right to shorter working hours
D.
expose the exploitation of the workers by their bosses
【简答题】Ann is a girl.  She is 12 years old.  She is from the U.S.A.  She is not tall and not short . She has a round face.  She has big blue eyes and a small nose.  Her mouth is wide, but her ears are small....
【判断题】红外光导摄像管中,红外图像所产生的温度分布可以把靶面上感应出相应电压分布图像的物理基础是光电效应。
A.
正确
B.
错误
【简答题】红外光导摄像管中,红外图像所产生的温度分布可以在靶面上感应出相应电压分布图像的物理基础是 ( )A. 光电效应 B. 电磁效应 C. 压电效应 D. 热电效应
【简答题】—What does your sister do ? — . A.She is in the supermarket. B,She is very tall. C.She is a teacher. D.She is fine.
【单选题】红外光导摄像管中,红外图像所产生的温度分布可以在靶面上感应出相应电压分布图像的物理基础是( )。
A.
压电效应
B.
电磁感应
C.
光电效应
D.
热电效应
【多选题】389 下列产品在选择分销渠道时,适合长渠道的是
A.
挖掘机
B.
方便面
C.
推土机
D.
饮料
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