常态点灯的进站色灯信号机显示一个绿色灯光—准许列车按规定速度经道岔直向位置进入或通过车站，表示运行前方至少有()闭塞分区空闲。
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What is the main idea of the news item？
A. The United States developed a computer chip for cell phones.
B. A new cell phone emergency alert system will be launched in the U.S.
C. Local cell phones towers have been built in many cities of U.S.
Dangerous messages could be conveyed through cell phones.
The opponents dont agree to the proposal of levying tax on the obese mainly because
A. they are very corpulent themselves.
B. the assessment system is not sound.
C. people should have their own rights.
D. it may cause a lot of social problems.
Which of the following statements is CORRECT？
A. People who don"t follow doctors" advice should pay tax.
B. Taxes collection on overweight people needs to be enhanced.
C. Parents should pay tax for their overweight children in Arizona.
Doctor"s advice for fat people is not offered on the Internet.
According to the news, what measure did authorities take to fight the flood？
A. Residents were asked to vacate their homes.
B. Some routines for the barges have been stopped.
C. Troops were brought in to help the victims.
D. Airplanes have been sent to rescue the assets.
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