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发布时间：2006-07-02 05:19     点击：

B. earthquakes happen most often during nighttime hours

C. the direction of an earthquake can be discovered

D. universities study the cause of earthquakes

66. The earthquake happened __________.

A. several minutes before the professor awoke

B. and the professor awoke at 4;15

C. in the centre of Boston 　　　　　　 D. when John Winthrop felt it

67. Choose the right order according to the text .

a. The bed was shaking and John Winthrop awoke.

b. John winthrop looked attentively at his watch.

c. John Winthrop got up to light a candle.

d. The earthquake happened in Bostonin 1755.

e. John Winthrop knew the quake’s direction.

f. John Winthrop knew the exact quake’s time.

g. John winthrop looked at the key on the floor.

A. g,d,e,a,c,b,f　　　　B. d,a,c,b,f,g,e　　　　C. a,e,d,c,b,f,g　　　　D. e,d,g,b,c,a,f

　　　　　　　　　　　　　　　　　　　　　(D)

Researchers have announced the results of two studies on the health effects of the drug aspirin(阿司匹林). one study shows aspirin can sharply reduce the chance that a healthy, older man will suffer a heart attack.

The study offered two new results from earlier findings. It said taking one aspirin pill every other day helped only healthy men over the age of fifty. It also said aspirin gave the greatest protection against heart attacks to men with low blood cholesterol(胆固醇) levels.

Earlier studies showed that aspirin reduced the chance of heart attacks in men with heart disease. But there was no proof that aspirin would do the same for health men.

The doctors who took aspirin suffered 44 percent fewer heart attacks than those taking the harmless pill. 139 men who took aspirin suffered heart attacks. Ten of them died. 239 men who did not take aspirin suffered heart attacks. Twenty-six of them died.

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