在实施光面爆破时,间隔时间(),壁面平整的效果越有保证
A、越长
B、较长
C、较短
D、越短
参考答案:D
Used to TV shows, where everything is quick and amusing, many people do not have ____ to read a book that requires thinking.
A.permission
B.freedom
C.patience
D.courage
鼓膜松弛部缺如的组织是()
A.肌层
B.黏膜
C.皮肤层
D.纤维层
E.以上都错