问题
单项选择题
消除散射线最有效的方法是
A.固有滤过
B.缩小照射野
C.增加物-片距
D.减少曝光条件
E.使用滤线栅
答案
参考答案:E
解析:使用滤线栅是消除散射线最有效的方法。
消除散射线最有效的方法是
A.固有滤过
B.缩小照射野
C.增加物-片距
D.减少曝光条件
E.使用滤线栅
参考答案:E
解析:使用滤线栅是消除散射线最有效的方法。
完形填空。 The Spring Festival is the Chinese New Year's Day. It usually _ 1 in February. Everyone in 2 likes the Spring Festival very much. When Spring Festival comes, Li Lei usually 3 his parents clean their house and do some 4 and other housework . 5 that day 6 in China eats 7 , New Year's cake and some other 8 food . Li Lei like New Year's cake , but Wang Lin says jiaozi is better than New Year's cake. The Chinese people 9 the New Year's cake and jiaozi in their houses. 10 happy they are! | ||||
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