问题
选择题
Curing _______ people is so important that doctors must be _______. [ ]
A. sick, careful enough
B. ill, enough carefully
C. sick, enough careful
D. ill, enough carefully
答案
答案：A
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Curing _______ people is so important that doctors must be _______. [ ]
A. sick, careful enough
B. ill, enough carefully
C. sick, enough careful
D. ill, enough carefully
答案：A
下表是某人血浆、原尿和尿液3种液体中主要物质的浓度比较表，请根据表回答：
| 种类 | A液（%） | B液（%） | C液（%） |
| 蛋白质 | 0 | 8 | 微量 |
| 葡萄糖 | 0 | 0.1 | 0.1 |
| 无机盐 | 1.25 | 0.72 | 0.75 |
| 尿素 | 1.8 | 0.03 | 0.03 |
| 尿酸 | 0.05 | 0.004 | 0.004 |
______为原尿，理由是______；
______为尿液，理由是______．