问题
选择题
下列物质的应用不正确的是（ ）
A．
石墨做电极
B．
二氧化碳做气体肥料
C．
氧气供给呼吸
D．
氮气填充闪光灯
答案
答案：D
搜题请搜索小程序“爱下问搜题”
下列物质的应用不正确的是（ ）
A．
石墨做电极
B．
二氧化碳做气体肥料
C．
氧气供给呼吸
D．
氮气填充闪光灯
答案：D
| 完形填空。 | ||||
| This is a story about a man and his son who went out to 1 a walk. The man had on a pair of odd (不配对的) shoes. 2 he came out in the street, he felt uncomfortable (不舒服). Turning to his son, he said, "Why is one of my legs 3 than 4 today?" The son 5 his father's legs and said, "You put on odd shoes." When he 6 this, the man was 7 and said, "What a clever son!" Then he 8 his son to go back to the house and get 9 pair of shoes for him. When the son went back, he said to his father, "I really 10 two shoes, but one has a thick sole (鞋底) and the other has a thin one." | ||||
|