水库的兴利库容是指()。
A.正常蓄水位与死水位之间的库容
B.正常蓄水位时水库的蓄水量
C.抵御设计洪水在水库中滞留的水量
D.拦洪库容与死库容之和
参考答案:A
转K6型交叉杆安全链松余量为()。
A.80——115mm
B.80——100mm
C.80——120mm
D.80——125mm
— How ____ the people in Yunnan?
— Very friendly. [ ]
A. were
B. was
C. is
D. do