题干

关于Access数据表的操作, 说法正确的是(   )

A:删除所有记录,则该数据表也被删除

B:数据类型为自动编号的字段值不能被编辑

C:在数据表中添加记录,则字段个数也会增加

D:修改字段名,数据表中相应的字段值也会改变

上一题 下一题 0.0难度 选择题 更新时间:2019-04-19 09:21:02

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B

同类题2

阅读理解

    We can have conflicts with our important persons like friends, relatives, workmates, etc. But the conflict doesn't necessarily mean that the relationship will be destroyed. In fact, sometimes conflict helps people to let out their silent feelings, allowing them to free their suppressed emotions. However, when in a conflict, we usually get angry and say or do things which aren't linked to the problem at hand. Therefore, it is important that we should try to avoid conflicts through effective communication.

    In a heated argument, we usually say things that aren't related to the real problem, and even use rude words to make sure we gain an advantage over the other persons. Then the whole situation goes badly. So we should not separate(隔离) the root cause of the problem and build our discussion around it. This ensures that there are no rude remarks and the situation moves in a positive direction.

    It's easy for us to think we're right and if something isn't working out, it surely must be someone else's fault. However, if you aim to solve a conflict, first of all, you should show some respect and allow the other persons to express themselves. Using remarks like, "I understand your concern on this "or "I know you're right at your end", would make the other persons feel more appreciated.

    Sometimes some people get too excited and may behave in the wrong way or say something others may not appreciate. This can cause a worse situation. Actually, they should control their emotions and keep calm. This has to be learned through self-control and observing behavior of other people.

    The tips mentioned above are useful for most situations. However, we don't rule out the possibility that there are some people who always want to create some sort of trouble for others. You can tell them from others, and putting in an effort to resolve a conflict with them may just not be a wise idea. The best way to deal with these people is to forget them. A famous saying can help you and that is: "You should never fight with a pig; you both get dirty and only the pig likes it."

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同类题4

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    Some unwelcome visitors from North America have been turning up in the waters off the coast of Great Britain.

    North American lobsters (龙虾) have been found in the North Sea (between Great Britain and Northwest Europe), far from their own habitat. The lobsters usually live along the eastern coast of Canada and the United States.

    It is impossible that the lobsters could have made the 5,600-kilometre journey on their own. They were probably brought to Britain and then got away from containers. Some of the lobsters that were caught had elastic bands (松紧带) holding their legs shut, like lobsters that are kept in containers in stores or restaurants.

    Many may have been “set free” from some ships passing through the area. Sometimes passengers order a live lobster from a tank in the dining room and then ask the waiter to throw it overboard instead of cooking it.

    According to official records, 26 North American lobsters have been caught in waters off Great Britain since 1988. However, it is believed many more have been found but not reported.

    It is against the law to let North American lobsters come into British waters. If they settle down in European waters, it would be bad for the local lobsters. The two live in the same place and eat the same food. But North American lobsters are larger, stronger and more aggressive (好斗的) than European lobsters, and they produce young more quickly.

    As a result, they could take food and space away from the local lobsters, and from other types of shellfish that live in the same area. These lobsters may also carry diseases that could harm the local lobsters.