数字探伤仪测距应使被检部位的最远反射波能够显示在屏幕（）之间。
参考答案：6～9格
照样子写一写。
例：亿（亿万）→忆（回忆）
欢（ ）→____（ ） 祖（ ）→____（ ）
洁（ ）→____（ ） 帜（ ）→____（ ）
用所给单词的适当形式填空。
1. What do you often do on (rain) days?
2.I don't like to sit on the chair. It's (comfortable).
3. Waiting for her made me (anger).
4. (walk)is good for our health.
5. I'd rather (walk) than take a bus.
