以秒表检查气导听力时选用的指标是 A．秒表与头正中线之间的距离 B．秒表接触颞骨的部
题型：单项选择题
问题：
以秒表检查气导听力时选用的指标是
A．秒表与头正中线之间的距离
B．秒表接触颞骨的部位
C．秒表与受检者间的距离
D．秒表的声强
E．听到秒表声持续的时间
题型：单项选择题
根据图片及对话内容排序。
A. Now pick up the scissors. Hold the paper carefully and cut through it. Keep the small piece of string
between you and the scissors, so you do not cut the string.
B. "Magic string" is a popular magic trick. You can do this trick for your friends or family. You just need
a piece of paper, a piece of string and some scissors. That's all.
C. Pick up the paper and fold side A down. Now your friends can see side B, but they can't see side A.
Side A is shorter than B, so it does not cover the string. Push the middle of the string up, and fold C
up over A. Now most of the string is inside the paper, but a small piece of the string is outside. You can
see it but your friends can't.
D. Put one hand over the paper, and then pull the string out slowly with your other hand. The string is still
in one long piece!
E. First, fold the paper so that it is like the paper in the picture. Side A is shorter than side B, but not much
shorter. Side C is much shorter than Side B. Show the long piece of string so that people can look at it.
Put this piece of string on the paper.
1._____2_____3._____4._____5._____