断面岸边第一条垂线的平均流速为1.06m/s,岸边流速系数为0.7,则岸边至第一条测速垂线间的部分平均流速为()。
A、0.64
B、0.74
C、0.85
D、0.95
参考答案:B
The English play __________ my students acted at the New Year’s party was a great success.
A.for which
B.at which
C.in which
D.on which
一个商标被认定为驰名商标之后,作为驰名商标的保护期限有多长