以河流为给水水源的集中式给水,根据实际需要,可把取水点上游( )以外的一定范围内划为水源保护区。
A.100m
B.200m
C.500m
D.1000m
参考答案:D
The scientific research on how to protect the rare animals is ________. Many scientists are working hard to find new way to raise the animals by man.
A.in danger
B.in control
C.in order
D.in progress
据估计,到2015年风能行业产能将比目前水平()以上。
A.翻两番
B.增长50%
C.增加两倍
D.增加三倍