上坡跑时，采用既省体力又安全跑法，宜采用（）上坡跑。
A、大步幅
B、中等步幅
C、小步幅
参考答案：C
半知菌和子囊菌的主要特征？
In the Northern Hemisphere a wind is said to veer when the wind（）.
A.Changes direction clockwise，as from north to east，etc
B.Changes direction violently and erratically
C.Remains constant in direction and speed
D.Changes direction counterclockwise，as from south to east，etc
