问题
选择题
下列各组概念中，前者包括后者的是[ ]
A．氧化物、单质
B．纯净物、化合物
C．化合物、混合物
D．氧化物、化合物
答案
答案：B
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下列各组概念中，前者包括后者的是[ ]
A．氧化物、单质
B．纯净物、化合物
C．化合物、混合物
D．氧化物、化合物
答案：B
| 完型填空 | ||||
| A thirsty bee went to a river to drink. As it was drinking, the bee was 1 away by the running water. A kind bird saw that the bee was in 2 . It picked 3 off a tree and threw 4 into the water in front of the bee. The bee climbed 5 the leaf, and it was brought 6 to the land. The bee thanked the bird a lot and then 7 away. Not 8 that, the bird was sitting 9 the branch(树枝) of a tree. It did not know that a man was shooting(射击) at it. But the bee saw 10 the man was doing. So it flew into the man’s 11 and stung (刺蜇) him. The 12 in the man’s eye was so great that he was not able to 13 the bird, and the bird flew away. 14 ways, the bee, 15 life had been saved by the bird, was able to save the life of the bird. | ||||
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