下列不属于光沿直线传播现象的是 [ ]
A．看不到不透明物体后面的物体
B．太阳落到地平线下还能看得见
C．人的身影早晚长，中午短
D．日食、月食
答案：B
My mother didn't ____ us leaving Kunming at once, so we had to stay there for ____ two days. [ ]
A. approve; other
B. approve of; more
C. approve of; another
D. approve; another
根据询问情况，交接班人员一起对乳化液泵站进行详细检查，并按（）进行试运转，查明存在问题。
A.操作规程
B.岗标
C.指令
D.手指口述
