截流设计流量可采用截流时期内()率的月或旬平均流量
A. 5%~10%
B. 10%~20%
C. 20%~30%
导流隧洞进出口与上下游围堰之间的距离,一般应大于(),以避免冲刷
A. 30m
B. 50m
C. 80m
导流隧洞进出口应与上下游水流相衔接,与河道主流的交角以()左右为宜
A. 30度
B. 45度
C. 60度
All the memories of his childhood had _______ from his mind by the time he was 65.
A. faded
B. illustrated
C. concerned