压水堆核电厂上充泵在一回路发生()事故或()事故而引起一回路温度、压力下降到一定值时，安注信号发生，又作为高*压安注泵从换料水箱吸取含硼水通过硼注箱向RCP系统冷段注水，或直接注入RCP系统的冷段和热段，防止堆芯烧毁。
A. 中小破口失水主蒸汽管道破裂
B. 大破口失水主蒸汽管道破裂
C. 主蒸汽管道破裂主给水管道破裂
D. 主给水管道破裂大破口失水
查看答案
What is the main idea of Para. 5？
A. Death rates from burns are higher in some developing countries.
B. European countries have the same death rates with America.
C. Many Asian girls died from the injuries from burns.
D. Reasons why so many Asian girls die from the injuries from bums.
Which of the following statements is true according to Para. 3？
A. Prevention strategies have not been used as widely as they should be.
B. All the deadly injuries come from car accidents for the 15 years old.
Children aged from 5 to 14 are more likely to be injured by car.
D. A new driver has to buy a child seat to prevent children injuries.
What is the effective prevention against injuries？
A. Leave the wells and swimming pools open as usual.
B. People who are drunk are forbidden to drive a car.
C. Send a guard near the window if living in an apartment,
D. Resist children to pack drugs, stove fuel and poisons.
What can we learn from Para. 1 ？
A. It is impossible to prevent children from being injured.
B. A number of methods need to be proved to protect children.
C. More children died from injuries in developing countries.
D. Nobody knows that accidents don"t have to happen.
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