问题 选择题

下列说法中,正确的是(  )

A.可能性很大的事件就必然发生

B.若一个事件不可能发生.那么它就是必然事件

C.如果一个事件发生的机会只有十万分之一,那么它就不可能发生

D.可能性很小的事件也可能会发生

答案

A、可能性很大的事件是随机事件,只是发生的概率较大,不一定发生,故此选项错误;

B、若一个事件不可能发生是不可能事件,故此选项错误;

C、如果一个事件发生的机会只有十万分之一,是随机事件,可能发生,故此选项错误;

D、可能性很小的事件也可能会发生是随机事件,也可能会发生,故此选项正确.

故选D.

填空题
单项选择题

The appeal of advertising to buying motives can have both negative and positive effects.

Consumers may be convinced to buy a product of poor quality or high price because of an advertisement. For example, some advertisers have appealed to people’s desire for better fuel economy for their cars by advertising automotive products that improve gasoline mileage. Some of the products work. Others are worthless and a waste of consumers’ money.

Sometimes advertising is intentionally misleading. A few years ago a brand of bread was offered to turned out that the bread was not dietetic (适合节食的), but just regular bread. There were fewer calories because it was sliced very thin, but there were the same number of calories in every loaf.

On the positive side, emotional appeals may respond to a consumer’s real concerns. Consider fire insurance. Fire insurance maybe sold by appealing to fear of loss. But fear of loss is the real reason for fire insurance. The security of knowing that property is protected by insurance makes the purchase of fire insurance a worthwhile investment for most people. If consumers consider the quality of the insurance plans as well as the message in the ads, they will benefit from the advertising.

Each consumer must evaluate her or his own situation. Are the benefits of the product important enough to justify buying it Advertising is intended to appeal to consumers, but it does not force them to buy the product. Consumers still control the final buying decision.

The passage tells us that ().

A. sometimes advertisements really sell what the consumer needs

B. advertisements occasionally force consumers into buying things they don’t need

C. the buying motives of consumers are controlled by advertisements

D. fire insurance is seldom a worthwhile investment