在牵伸区内，罗拉的握持距应大于纤维的品质长度。
参考答案：对
The father as well as his three children _____ skating on the frozen river every Sunday afternoon in winter.[ ]
A. is going
B. go
C. goes
D. are going
焦虑自评量表(SAS)总分的粗分是40，标准分为()
A．60分
B．50分
C．40分
D．30分
E．20分
