搜题请搜索小程序“爱下问搜题”
问题 单项选择题

取土样，装入10g重铝盒中，称其重量为50g，放入烘箱烘干后重40g，则土壤重量含水率为（）。

A、20%；

B、25%；

C、33.3%；

D、40%

答案

参考答案：B

单项选择题

A 69-year-old client asks the nurse what the difference is between osteoarthritis (OA) and rheumatoid arthritis (RA). Which response is correct

A. OA is a noninflammatory joint disease. RA is characterized by inflamed, swollen joints.
B. OA and RA are very similar. OA affects the smaller joints, and RA affects the larger, weight-bearing joints.
C. OA affects joints on both sides of the body. RA is usually unilateral.
D. OA is more common in women. RA is more common in men.
查看答案
填空题

风力灭火机主要是由（），（），（）等组成。
查看答案