飞行区的地面部分包括（）。
A.跑道
B.候机楼
C.滑行道
D.停机坪
E.机库
参考答案：A, C
There are some _______between _______ languages . So they are used ________.
A．different; different; differently
B．differences; differences; different
C．differences; different; differently
D．differently; difference; different
孕妇开始知觉胎动的时间是（ ）
A．妊娠15-17周
B．妊娠18-20周
C．妊娠21-22周
D．妊娠23-24周
E．妊娠27周以上
