[单项选择]第一篇 Pushbike Danger Low speed bicycle crashes can badly injure——or even kill——children if they fall onto the ends of the handlebars(车把)．So a team of engineers is redesigning it to make it safer Kristy Arbogast，a bioengineer at the Children’s Hospital of Philadelphia in Pennsylvania， began the project with her colleagues．The cases they reviewed about serious abdominal(腹部的) injuries in children in the past 30 years showed that more than a third were caused by bicycle accidents．”The task was to identify how the injuries occurred and come up with seine countermeasures，”she says By interviewing the children and their parents，Arbogast and her team were able to reconstruct many of the accidents and identified a common cause for serious injuries They discovered that most cases occur when children hit an obstacle at slow speed，causing them to topple f摇摆)over．To maintain their balance the children turn the handlebars through 90 degrees—but their momentum(冲力)for
A. they are not beautiful
B. they may kill children
C. they are likely to crash．
D. they affect the speed of the bike

[单项选择]第一篇 Pushbike Danger Low speed bicycle crashes can badly injure——or even kill——children if they fall onto the ends of the handlebars(车把)．So a team of engineers is redesigning it to make it safer Kristy Arbogast，a bioengineer at the Children’s Hospital of Philadelphia in Pennsylvania， began the project with her colleagues．The cases they reviewed about serious abdominal(腹部的) injuries in children in the past 30 years showed that more than a third were caused by bicycle accidents．”The task was to identify how the injuries occurred and come up with seine countermeasures，”she says By interviewing the children and their parents，Arbogast and her team were able to reconstruct many of the accidents and identified a common cause for serious injuries They discovered that most cases occur when children hit an obstacle at slow speed，causing them to topple f摇摆)over．To maintain their balance the children turn the handlebars through 90 degrees—but their momentum(冲力)for
A. Thirty．
B. Ninety．
C. 50 percent．
D. More than a third.

[简答题].(1). When we talk about the danger of romantic love, we don’t mean danger in the obvious heartbreak way -- the cheap betrayals, the broken promises -- we mean the dark danger that lurks when sensible, educated women fall for the dogmatic idea that romantic love is the ultimate goal for the modem female. Every day, thousands of films, books, articles and TV programs hammer home this message --that without romance, life is somehow barren. However, there are women who entertain the subversive notion, like an intellectual mouse scratching behind the skirting board, that perhaps this higher love is not necessarily the celestial highway to absolute happiness. (2). Their empirical side kicks in and they observe that couples who marry_ in a haze of adoration and sex are, ten years later throwing china and fighting bitterly over who gets the dog. (3). But the women who notice these contradictions are often afraid to speak them in case they should be labelled cynics. Surely only the mos

[单项选择]第一篇 　　 Water 　　The second most important constituent (构成成份) of the biosphere (生物圈) is liquid water. This can only exist in a very narrow range of temperatures, since water freezes at 0℃ and boils at 100℃. Life as we know it would only be possible on the surface of a planet which had temperatures somewhere within this narrow range. 　　The earth’s supply of water probably remains fairly constant in quantity. The total quantity of water is not known very accurately, but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers. Most of it is in the form of the salt water of the oceans about 97 percent. The rest is fresh, but three quarters of this is in the form of ice at the Poles and on mountains, and cannot be used by living systems until melted. Of the remaining fractional which is somewhat less than one per cent of the whole, there is 10—20 times as much stored underground wat
A. in the center of the earth.
B. on the surface of our planet.
C. in a very narrow range of temperatures.
D. in the coastal areas of the earth.