题目内容
Changes in the value of currency help some parts of the economy and hurt others.
When people go to foreign countries, they have direct experience with the exchange rate (汇率)of money.International travelers must use their own money to buy the currency of the country they are visiting.For example, Americans on holiday in a foreign country can buy more currency when the dollar has a high exchange value.
So a high exchange value is good for vacationers.It is not so good for exporting.A strong dollar means that American exports are more costly.Other countries are less likely to import products from the United States because they are too costly.American agricultural goods, computers and airplanes all are more costly on the world market when the dollar is strong.
However, sellers of foreign goods within the United States are helped by a strong dollar.A strong dollar means that American companies can buy more with the same amount of money.They can sell goods at a low price in the "United States and still make a profit.
This helps to increase the American trade deficit(贸易逆差).
A weak dollar helps American companies that do business overseas.For example, the American computer industry gains because its products are less costly to foreign buyers.Financial magazines report that technology companies like Intel and Microsoft have increased profits because of the weak dollar. Increased trade helps reduce the American trade deficit.
The United States Department keeps information on America's imports and exports. Information on the third quarter of 2003 shows that America's trade deficit did fall.American exporters should gain the most from the falling dollar.But, the effect of the weakening dollar on the United States trade deficit remains to be seen.
1.American vacationers prefer dollars to be strong so that ______.
A.they can buy more currency in foreign countries
B.they can be proud of being Americans
C.Americans can export more goods
D.other countries import more products from the United States
2.Other countries are unwilling to import agricultural products from America, because ______.
A.American businessmen import only a few goods from other countries
B.American government don't want other countries to import goods from America
C.American goods are more costly because of the strong dollar
D.American businessmen make a lot of money by selling foreign products cheaply
3.According to the passage, American trade deficit can be reduced by ______.
A.increasing the dollar exchange value
B.making the dollar weak in exchange value
C.forcing foreign countries to open their markets further
D.buying less costly foreign goods
4.Which best serves as a title for this passage?
A.American imports and exports
B.Exports between America and other countries
C.Americans enjoying cheap foreign products
D.The falling of the dollar
ACBD
The findings come ___36___ a study of nearly 1,000 US people that looked at diet, calorie intake and body mass index (BMI) - a measure of obesity.___37___ is found that those who ate chocolate a few times a week were, on ___38___, slimmer than those ___39___ ate it occasionally. Even though chocolate is loaded with calories, it contains ingredients(材料)that may favour weight loss ___40___ than fat synthesis, scientists believe.___41___ boosting calorie intake, regular chocolate consumption was related to lower BMI in the study, ___42___ is published in Archives of Internal Medicine. The link remained even when other factors, like how ___43___ exercise individuals did, were taken into ___44___.And it appears it is how often you eat chocolate that is important, rather than how much of it you eat. The ___45___ found no link with quantity consumed.
___46___ to the researchers, there is only one chance in a hundred that their findings could be explained by chance alone. Lead author Dr Beatrice Golomb, from the University of California at San Diego, said: "Our findings appear to add to a body of information suggesting that the composition of calories, not just the number of them, matters for determining their ultimate impact on weight."This is not the first time scientists ___47___ that chocolate may be healthy for us. Other studies have claimed chocolate may be good for the heart. Consumption of certain types of chocolate has been linked to some favourable changes in blood pressure, insulin(胰岛素)sensitivity and cholesterol(胆固醇)level. And chocolate, ___48___ dark chocolate, does contain antioxidants(抗氧化剂)which can help to mop up harmful free radicals - unstable chemicals that can damage our cells.
Dr Golomb and her team believe that antioxidant compounds, called catechins(儿茶素), can improve lean muscle mass and reduce weight ___49___ studies in rodents would suggest this might be so. Mice ___50___ for 15 days with epicatechin (present in dark chocolate) had improved exercise performance and observable changes to their muscle composition.They say clinical trials are now needed in humans to see ___51___ this is the case.
But before you reach ___52___ a chocolate bar, there are still lots of unanswered questions. And in the absence of conclusive evidence, experts advise caution.While there's no harm in allowing yourself a treat like ___53___ now and again, eating too much might be harmful because it often ___54___ a lot of sugar and fat too.And if you are looking to change your diet, you are ___55___ to benefit most from eating more fresh fruits and vegetables.
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