问题
单项选择题
下述哪项与半价层有关提法不正确（）
A、半价层高射线质高
B、半价层高穿透能力强
C、低能X线用铝表示半价层
D、高能X线用铜表示半价层
E、照射野面积大于半价层
答案
参考答案：E
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下述哪项与半价层有关提法不正确（）
A、半价层高射线质高
B、半价层高穿透能力强
C、低能X线用铝表示半价层
D、高能X线用铜表示半价层
E、照射野面积大于半价层
参考答案：E
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| A generation gap (代沟) has become a serious problem. I read a 1__ about it in the newspaper. Some children have killed themselves after quarrelled with _2 .I think this is because they don't often have a talk with each other. Parents now 3 more time in the office, 4__they don't have much time to stay with their children. As time passes, they both feel that they don't have the _5 topics to talk about. I want to tell parents to be more with your __6_ , get to know them and _7 them. And for children, show your __8__ to your parents. They are the people who love you. So _9_ them your thoughts. In this way, you can have a _10 understanding of each other.
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