对于中年以上者,发生无痛性间歇性肉眼血尿应高度怀疑()。
A.泌尿系统畸形
B.泌尿系统肿瘤
C.泌尿系统结石
D.泌尿系统炎症
E.泌尿系统结核
参考答案:B
_____the problem of land erosion getting more serious, the government is searching for a way to deal with it.
A.As
B.With
C.When
D.If
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