阅读理解。
WENZHOU(Xinhua)-The train collision in east China's Zhejiang Province has killed 39 people and
left 192 others injured as of Sunday night, said a spokesman with the Ministry of Railways.
A total of 132 people are still being treated in hospitals, said Wang Yongping, spokesman with the
ministry at a press conference. Eleven people remain in critical condition, said Cheng Jinguo, head of the
health bureau in the city of Wenzhou, where the collision happened Saturday night. Cheng said at the
press conference that 52 people who suffered slight injuries had been discharged from hospital. Wang
expressed condolences (哀悼) to the concerning families and sincere apology to all the passengers.
The train's "black box" has been discovered and the ministry is investigating the cause of the crash,
Wang said. Wang said the ministry will make public the cause of the accident as soon as the investigation
is done and publish the names of the killed and injured. He said the crash has caused large number of
casualties and great property losses. The ministry will find out the cause through thorough investigation
and take effective measures to prevent similar accidents.
Despite the accident, the spokesman said the ministry is still confident in the high-speed train. "China's
high-speed train is advanced and qualified. We have confidence in it," he said.
The damaged rails have been repaired and were ready to restart operation but the reopening was delayed by the stormy weather, according to Wang. Wang did not provide the exact time when the line would
start operating again.
The accident occurred at about 8:30 p.m. Saturday on a bridge near Wenzhou when bullet train D301
rear-ended (追尾)D3115, which reportedly lost power after lightning strike.
1. According to Cheng Jianguo, ______ people who had been slightly injured had been
recovered and left hospital.
A. 39
B. 139
C. 52
D. 11
2. What can be inferred from the passage?
A. The operation was restarted the next day.
B. There was a thunderstorm when the trains crashed.
C. The cause of the collision was made clear.
D. Similar accidents would be avoided in later operations.
3. Which of the following is NOT true?
A. The Railway Ministry is investigating the cause with the help of the "black box".
B. Bullet 
train D301 hit the train D3115 that stopped ahead of it due to lack of power.
C. Bullet train D3115 was forced to stop as a result of human interference.
D. The operation of the line would be restarted with the stormy weather over.
4. What can be the best title of the passage?
A. Trains Crashed Causing Deaths and Damage.
B. Terrible Weather Leading to Trains' Collision.
C. Investigations upon Trains' Collision.
D. Confidence in Development of High-speed Trains.
可知，导体的电阻与该导体两端的电压成正比 
可知，做匀速直线运动物体的速度与通过的路程成正比