问题
选择题
如图是探究植物进行某些生理过程的实验装置，其中，乙装置罩上不透光的纸盒（如图所示）．几小时后，观察到两装置的试管内有气体产生（如图a、b）．产生的a、b气体分别是（ ）
A．氧气、氧气
B．二氧化碳、氧气
C．氧气、二氧化碳
D．二氧化碳、二氧化碳
答案
答案：C
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如图是探究植物进行某些生理过程的实验装置，其中，乙装置罩上不透光的纸盒（如图所示）．几小时后，观察到两装置的试管内有气体产生（如图a、b）．产生的a、b气体分别是（ ）
A．氧气、氧气
B．二氧化碳、氧气
C．氧气、二氧化碳
D．二氧化碳、二氧化碳
答案：C
| 词组活用。 | |
2. He ____ a five-year-old boy ____drowning in the river, so he was well thought of. 3. He was a warm-hearted and diligent boy, and ____ ____ by his classmates. 4. ____ your hand if you know the answer. 5. During the war,many buildings were destroyed, and paintings and statues ____ in Iraq. 6. They live on grasslands where they can easily ____ ants and worms. 7. ____ last term, we had learned 3,000 words. 8. He's ill; you should call in the doctor ____. 9. Our hunt for a cheaper but larger house is at last ____. 10. ____ wild animals are dying out. |