平行文是指向同级机关或不相隶属机关送交的公文，主要有（）。
A.通知
B.通告
C.函
D.会议纪要
参考答案：C
看下面的四季图完成句子。
winter spring summer fall
1. In winter, it's __________ and snowy. Many trees don't have any __________.
2. In spring, the weather is __________. Trees have new leaves.
3. In summer, it's very __________. Trees have cool, green leaves.
4. In fall, the trees lose their __________. What colour are fall leaves? Yellow, orange and red.
大断面巷道掘进时掏槽眼的布置原则是什么？
