胸导管经何横膈裂孔进入胸腔（）
A.腔静脉孔
B.与迷走神经伴行
C.主动脉裂孔
D.食管裂孔
E.胸导管裂孔
参考答案：C
Think and write.（想一想，连词成句）
1. I help can you (?)
_______________________________________________
2. much that pretty how is dress (?)
3. they ducks are (?)
4. hens are the fat (.)
5. horses there how are many (?)
种植下列几种农作物对pH的要求是：大豆6～7，甜菜7～7.5，茶叶5～5.5，西瓜6，如果某地区经常降酸雨，则最不适合种植的农作物是
A．大豆
B．甜菜
C．茶叶
D．西瓜
