下钻时大钩负荷超过()吨必须挂涡磁刹车。
参考答案:30
江玲上学期期末考试中,语文、数学的平均分是93分,如果算上英语,这三科的平均分是95。你能算出江玲英语考了多少分吗?
He knew nothing about the matter, but he talked as if he __it.
A.knows
B.knew
C.had known
D.would know