耳蜗感受高频声的部位是()。
A.蜗底区
B.蜗顶区
C.耳蜗中间区
D.三者均可
E.以上都不是
参考答案:A
All the dishes in this menu, ____ otherwise stated, will serve two to three people. [ ]
A. as
B. if
C. though
D. unless
10kV/0.4kV配电变压器正常运行时,若负荷电流为100A,则变压器高压侧的电流应为()A。
A.10
B.5
C.4