下列肉制品需要真空搅拌的是（）。
A.午餐肉
B.红烧扣肉
C.肉干
D.肉脯
参考答案：A
某学习小组选一名身高为1.6m的同学直立于旗杆影子的顶端处，该同学的影长为1.2m，同一时刻旗杆影长为9m，那么旗杆的高度是______m．
Has Jack finished his homework yet?
I've no idea, But he _____ it the whole afternoon. [ ]
A. would do
B. was doing
C. did
D. had done
