相同固结度时,单面排水的时间是双面排水时间的()。
A、2倍
B、4倍
C、1/2
D、1/4
参考答案:D
At the Beijing Olympics, Bolt broke the 100-meter and 200-records and became the _____man in the world.
A.fastest
B.heaviest
C.tallest
D.slowest
功能固着