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【单选题】
()是指商品品种的数量,即同一类商品中,不同的质量,不同尺寸,不同花色品种的数量A.
商品结构
B.
商品的广度
C.
商品的深度
D.
商品的宽度
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反馈参考答案：
举一反三
【单选题】关于链球菌M蛋白，错误的是
A.
是链球菌细胞壁中的表面蛋白质
B.
具有抗吞噬和抵抗细胞内杀菌作用
C.
能刺激机体产生型特异性抗体
D.
与心肌、肾小球基底膜有共同抗原成分
E.
具有细胞毒性
【单选题】What is the significance for the parents of young drug users to focus their efforts on pot smoking*
A.
Marijuana is the illegal drug most used by kids.
B.
Pot smoking may directly lead to the use of cocaine and heroin by young people.
C.
The withdrawal from pot smoking contributes to abandoning other drugs.
D.
This is the way they found effective to make contributions to society.
【单选题】What is the Chinese newspapers' attitude to the parents described in this article?
A.
Sympathetic.
B.
Critical.
C.
Approving.
D.
Neutral.
【单选题】What is the parents responsibility?
A.
Make sure the child repairs the bike.
B.
To do all the repairs themselves.
C.
To check that the bike is fit to use.
D.
To clean the bike regularly.
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