有关尿毒症的描述正确的是（）
A.透明管型
B.颗粒管型
C.肾衰竭管型
D.红细胞管型
E.白细胞管型
参考答案：C
用适当的介词填空。
1. Danny isn't ____ school today, and he has been ____ for three weeks.
2. I'm going to play basketball on the playground ____ school.
3. There are plenty flowers in the garden.
4. What shall we write our poster?
5. Let's make a poster ____ drinking.
6. Drinking too much is also bad ____ your health.
7. I have an idea ____ your plan.
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