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【简答题】
Sharon Suarez has been looking forward to the day when she won't have to carry groceries(食品杂货)from her car to her house. That day has come. A growing number of people are shopping on the Internet. “I've never done it, but it sounds great, "Miss Suarez said. “It is so hot here in the summer. It's also really cold in the winter. I would love to stay inside and have the groceries come to me." Of course, people already buy books, do their banking, and shop for presents on the Internet. But when they need to shop for food, most still get in the car and go to the supermarket. An American visits a supermarket 2.2 times a week. Part of the problem is that many shoppers want to see the food they buy. While they might buy a CD or a book without seeing it, most people don't want to buy food the same way. They worry about bad food and late deliveries(送贷).But all this is slowly changing. People are beginning to find that it takes less time to buy food over the Internet. And, they are finding that delivery is fast, cheap, and the food is good.
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A.
青鱼、草鱼、鲢鱼、鳙鱼
B.
青鱼、鲫鱼、鲢鱼、鳙鱼
C.
青鱼、鲫鱼、鲤鱼、鳙鱼
D.
青鱼、鲤鱼、鲢鱼、鳙鱼
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A.
定额是节约社会劳动和提高劳动生产率的重要手段
B.
定额是组织和协调社会化大生产的工具
C.
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D.
定额是实现管理的有效手段
E.
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A.
某些重要蛋白质的结构和稳定性发生了改变
B.
某些重要蛋白质的功能发生了改变
C.
某些基因表达水平发生改变
D.
DNA分子GC含量发生改变
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A.
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B.
本厂产生的污染物对周围环境产生的影响没关系。
C.
指导烟囱的安放位置。
D.
与建筑物和构筑物的朝向无关。
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A.
青鱼、鲫鱼、鲤鱼、草鱼
B.
草鱼、青鱼、鲢鱼、鳙鱼
C.
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A.
1/20000 pa-1
B.
0.5*10-5 pa-1
C.
0.5*10-9 pa-1
D.
0.5*10-8 pa-1
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A.
正确
B.
错误
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