保证岩溶发育的充要条件是()。
参考答案:水的流动性
与血β2-M水平有关的是()
A.体重
B.年龄
C.炎症
D.肿瘤
E.性别
In Paragraph 3, the expression "have no compunction about" most probably means "have no ______.
A.reaction to
B.understanding of
C.second thoughts about
D.enlightenment on