_____ is the final stage of urine production occurring when the special cells of the renal tubules secrete ammonia, uric acid, and other waste substances directly into the renal tubule.
A.
Filtration
B.
Reabsorption
C.
Secretion
D.
Evacuatio n
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参考答案:
举一反三
【单选题】According to the passage, which of the following statements can not be considered as the reason of the 'smelly' house of the poor?
A.
The outdoor privy is smelly.
B.
The refrigerator has gone out of order.
C.
The housewife cannot afford the time to clean the mattress.