在北半球由高压区飞向低压区．航线上一定会碰上（）.
A.顺风
B.左侧风
C.右侧风
参考答案：B
By making friends with native speakers, one can ______ a lot of their languages.[ ]
A．set up
B．pick up
C．bring up
D．take up
器具通气管
