配制石油沥青防腐层所用低漆时,石油沥青与汽油的比例为()。
A.1:1
B.1:2
C.1:3
D.1:(2~3)
参考答案:D
根据句意,用适当的单词填空。
1. —_______ you have a basketball? —Yes, I _______.
2. —Does Gina _______ a math book? —No, he _______.
3. —_______ Chi-Young have a tennis racket? —Yes, _______ does.
4. _______ play volleyball.
5. My brother _______ have a notebook.
6. She _______ sports every day.
7. That sounds _______.
8. My sister _______ five baseballs.
9. —Do you have _______ ball? —No, we _______.
10. I don't like math. It's _______.
大黄抗炎作用的机理是()
A.拮抗醛固酮的活性
B.抑制肾髓质的Na+-K+-ATP酶
C.抑制肾小管对水及电解质的吸收
D.收缩血管,减少渗出
E.抑制花生四烯酸代谢