填空题


【参考答案】

B
<上一题 目录 下一题>
热门 试题

单项选择题
A．More and more cities appear.B．There are increasing complaints about environmental problems.C．More and more people pour into cities.D．One-third of industrial sewage in the cities went untreated.
A．More and more cities appear.
B．There are increasing complaints about environmental problems.
C．More and more people pour into cities.
D．One-third of industrial sewage in the cities went untreated.
填空题
O
相关试题