支前民工的三件宝是什么？
参考答案：支前民工三件宝是民工的常用装备，分别是狗皮、蓑衣、葫芦瓢。
--- Do you know ______ tomorrow?
--- At 8 o'clock.
A．when did she come
B．when she came
C．when will she come
D．when she will come
咽鼓管咽口位于（）后方1．0～1．5cm处。
