A、
It doesn't work as expected.
B、
It can do harm to children.
C、
It can find out serious injuries.
D、
It can provide detailed image of the brain.
【正确答案】
B
【答案解析】
A、
Many children suffer greatly from brain injury.
B、
Many children are threatened by lung cancer.
C、
Children suffer more from brain injury than from cancer.
D、
Children have a high risk of developing cancer.
【正确答案】
D
【答案解析】
A、
When a child aged two has no broken bone in the skull.
B、
When a child aged ten lose consciousness.
C、
When a child aged one has no serious headache.
D、
When a child aged nine has normal mental activity.
【正确答案】
B
【答案解析】
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