更多"When might a shark attack humans（）"的相关试题:
[填空题]Dingoes are known to attack humans.
[填空题]Spiders often kill humans in Britain when they pierce human skin.
[单项选择]
When did the terrible attack take place
[简答题]Passage One
When the terrorist attack on September 11th caused people to flee the building, Avremel Zelmanowitz risked his own chance of escape by staying behind with his friend and colleague, Ed Beyea, who was Confined to a wheelchair due to a par’alysis (瘫痪). Both men lost their lives, but the stray of Avremel’s love and devotion to his friend conveys a life-giving message to all.
Avremel never married, and he shared a house with his brother and his family. He was a loving uncle to his brother’s children; and he was devoted to caring for his aging parents. He was a "family man" in every sense of the word. At the same time, he had his own life, his varied interests, and a job and friends.
When the tragedy occurred, Avremel was age 55, and his friend, Ed Beyea, was age 42. Ed became disabled after a diving accident at age 22, but he managed to work 14 years at Blue Cross since his injury Both he and Avremel were program analysts who worked on the 27th floor of World Trade Center.
T
A. A．Avremel rescued Ed at tile cost of his life.
B．Both Avremel and Ed gave up their chance of escape.
C．Avremel stayed with Ed and both lost their lives.
D．Both Avremel and Ed were finally rescued.
[单项选择]When risk of death from heart attack is plotted on a graph against alcohol consumption, studies consistently show a U-shaped curve, which suggests that non-drinkers and heavy drinkers have higher rates of heart disease than light to moderate drinkers. The implication is that moderate drinking offers protection from heart disease.
For years, doctors believed that the death rate among people who do not drink at all was artificially high because it included a substantial number of reformed drinkers, irreparably damaged by alcohol. However, more recent studies which separate life-long drinkers from abstainers have shown that abstainers are still at high risk.
Studies have shown that moderate drinkers have higher levels of high-density lipoproteins (脂蛋白) in their blood. This is the "good" cholesterol that protects against heart disease. Alcohol also appears to reduce the risk of heart diseases. Though drinking alcohol in moderation undoubtedly brings some benefits, it is impor
A. Why people should not drink alcohol.
B. The relationship between drinking alcohol and the possibility of cancer.
C. Benefits and dangers of drinking alcohol.
D. Reasons for drinking alcohol.
[简答题]One might ask why speculation is permitted when there is so real a danger of loss. The basic reason is that speculation can perform useful functions in the economy. Buying a commodity or stock, in the belief that prices will rise speeds market equilibrium and encourages faster entry of more suppliers. If the price change lagged until after an actual commodity shortage had occurred, the fluctuation would probably be sharper and more sudden. Remedial supply action could not be further delayed. Similarly, if speculators foresee a surplus in some commodity, their selling of futures will help drive the price down to some extent before the surplus actually occurs. When speculators foresee a shortage and bid up the price, they are also helping to conserve the present supply. As the price goes up, less of the commodity is purchased; a rise in price encourages users to economize. Similarly, a lowering of price encourages users to buy more, thus helping to sell the surplus which is developing.
[单项选择]A liquid that might be a poor conductor when pure is often used to make solutions that readily transmits electricity.
[填空题]We started the attack when the enemy (cross) ______ the river.
