光合作用的实质是:把________和_______转变成有机物,把光能转变成储存在有机物里的________。
水 二氧化碳 化学能
读一读,根据短文选择答案。
Today is Sunday. My father and my mother don't go to work. They come to the zoo with me.
We see many animals. Look, birds have beautiful feathers, the elephant has a long trunk, tigers have many
black stripes. Monkeys are playing on the hill. The monkeys are very funny (有趣). We look at them and they
look at us. We give them some bananas, they are happy, and we are happy, too.
1. Today is ___________.
A. Saturday
B. Sunday
C. Monday
2. ___________ have beautiful feathers.
A. Birds
B. Tigers
C. Monkeys
3. ___________ have many black stripes.
4. Monkeys are ___________, and we are ___________, too.
A. sad; happy
B. happy; sad
C. happy; happy
穿过四边孔的血管是()
A.旋肱后动脉
B.旋肱前动脉
C.旋肩胛动脉
D.旋肩胛静脉
E.肩胛上神经