问题
填空题
当海洋中的浮游藻类沉降到______以下深度，而又不能很快回升时，就会死亡。
答案
参考答案：光补偿点
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当海洋中的浮游藻类沉降到______以下深度，而又不能很快回升时，就会死亡。
参考答案：光补偿点
| 选词并用其适当形式填空。 | |
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| In the fourteenth and fifteenth centuries more and more land was used l college buildings. The town grew much 2 in the nineteenth century after the opening of the railway in 1845.Cambridge (剑桥) became a 3 in 1951 and now it has a population of over 100,000. Many young students in other countries 4 to study at Cambridge. 5 0f people from all over the world come to visit the university town. It has become a famous place all 6 the world. 1. 2. 3． 4. 5. 6． |