问题
单项选择题
关于气体探测器优点的叙述，错误的是（）
A.稳定性好
B.响应时间快
C.几何利用率高
D.适合做成多排的探测器阵列
E.无余辉
答案
参考答案：D
解析：气体探测器的优点是稳定性好、响应时间快、几何利用率高、无余辉产生。气体探测器的主要缺点是吸收效率较低；其次是在制作工艺上只能做成单排的探测器阵列，无法做成多排的探测器阵列。
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关于气体探测器优点的叙述，错误的是（）
A.稳定性好
B.响应时间快
C.几何利用率高
D.适合做成多排的探测器阵列
E.无余辉
参考答案：D
解析：气体探测器的优点是稳定性好、响应时间快、几何利用率高、无余辉产生。气体探测器的主要缺点是吸收效率较低；其次是在制作工艺上只能做成单排的探测器阵列，无法做成多排的探测器阵列。
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| A London family were enjoying an unusual holiday in Iceland last month when things went very wrong. Anne, Ben and their two children, Claire and Sam, __1__ died in freezing water. The accident happened while the family were visiting a glacier (冰河). It is a beautiful place. __2__ were walking along the edge of the ice when suddenly they fell off the ice __3__ the cold water. Ben __4__ a cry for help and ran to see what was happening. "I found my wife and children in the ice water. And then my wife Anne just sank (沉没) __5__ the ice. It was terrible." Ben __6__ his children from the water, but when he went to save his wife, he fell in, too, as he was trying to __7__ Anne. __8__ when he was in the water, he went all out to catch hold of Anne and helped her out of the water." Her face was blue. __9__ was really frightening." Anne spent three days in hospital there before the family __10__. And what are their plans for their next holiday? | ||||
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