下列各风向示意图中，表示南半球近地面的是（单位：百帕）
A、①②
B、③④
C、①③
D、②④
答案：C
34. ----There's something wrong with the machine. Who is _____?
-----None. The machine is too old to work.
A．blamed
B．scolded
C．to blame
D．answered for
可引起农民肺的粉尘是
A．棉、麻等植物性粉尘
B．田间飞扬的粉尘
C．谷物类粉尘
D．霉变枯草粉尘
E．飞扬的人、畜粪粉尘
