剪切机刀片的后角α值一般为()。
A、1°~2°
B、1.5°~3°
C、2°~4°
D、2.5°~5°
参考答案:B
—What do you think of Town Cinema?
—Very good. It's _____ than other cinemas and it has _____ service.[ ]
A. expensive, the friendliest
B. cheaper, the friendliest
C. the cheapest, the most friendly
D. more expensive, the worst
人体最重要的神经内分泌器官是
A.下丘脑B.垂体C.甲状腺D.肾上腺E.性腺