属于立直反射的是（）
A.降落伞反射
B.阳性支持反射
C.肱二头肌反射
D.倾斜反应
E.对光反射
参考答案：A
The road is designed for only motor vehicles, so once _____, bicycles are not allowed to go along it. [ ]
A. opens
B. having opened
C. opening
D. opened
菌柄
