China to help Europe Develop GPS Rival China is to contribute to a new global satellite navigation system being developed by European nations. The Gal...
Diet, Alcohol Linked to Nearly One Third of Cancers Diet is second only to tobacco as a leading____1____of cancer and, along with alcohol, is responsi...
Public and Private Schools in the United States Religious and private schools receive little or no support from public taxes in the United States, and...
One Good Reason to Let Smallpox Live It’s now a fair bet that we will never see the total extinction of the smallpox virus. The idea was to cap the gl...
Wonder Webs Spider webs are more than homes, and they are ingenious traps. And the world’s best web spinner may be the Golden Orb Weaver spider. The ...
Healthy Food Street sellers, particularly in developing countries, supply large amounts of food __1__ people on low incomes. This sector also employs ...
Scientists Develop Ways of Detecting Heart Attack German researchers have____1____a new generation of defibrillators and early-warning software aimed ...
Homosexuals Many homosexuals prefer to be called gay or, for women, lesbian. Most of them live quiet lives just___1___anyone else. Some gay people hav...
Solar Storm At the end of October 2003, a sudden solar storm hit the earth. A solar storm _1_ the large amounts of charged particles released into spa...
第一部分 词汇选项词汇学习 一A B A B B B D A C A B D A C A词汇学习 二A C C A B A C C B A C C A B C词汇学习 三B C B A D B B C D B A A D A C词汇学习 四A D B A A C D B D B A C A B B词...