我国可以发展边境贸易最多的省（区）是（）
A.内蒙古
B.新疆
C.云南
D.西藏
参考答案：C
Last night I came across the man ____ you think is pleasant to ________.
A．who; get along
B．whom; get along
C．who; get along with
D．whom; get along with
隔膜式往复泵是依靠隔膜片来回鼓动来达到吸入和（）液体的。
A、压入
B、流入
C、排出
D、吸进
