问题
多项选择题
下列有关实时灰阶超声诊断仪的调节，错误的是
A．一旦仪器固定，探头的频率也是固定不变的
B．前处理可理解为“脏器最佳条件预置”
C．深度增益补偿在不同的探头不同的频率不同的脏器均需要区别对待
D．总增益过高可能妨碍对小病变的辨认
E．聚焦调节可选择两点和多点聚焦
答案
参考答案：A,B
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下列有关实时灰阶超声诊断仪的调节，错误的是
A．一旦仪器固定，探头的频率也是固定不变的
B．前处理可理解为“脏器最佳条件预置”
C．深度增益补偿在不同的探头不同的频率不同的脏器均需要区别对待
D．总增益过高可能妨碍对小病变的辨认
E．聚焦调节可选择两点和多点聚焦
参考答案：A,B
This is a picture of Mr. Green's family. __1 the picture we can see Mr. green, Mrs. Green, their son Jim 2 their daughter Susan. Mr. Green is _3 in a chair. He is _4 a newspaper. Mrs. Green _5 some housework. Jim is a Middle School student. He is reading a book near the window. Look at 6 She is playing with her toys _7 the floor. She is Mr. Green and Mrs. Green's daughter, Susan _8 that behind Susan? It's a _9 . What's the cat doing? It's playing 10 a ball.
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