龟板的药用部位是()
A.背甲
B.鳞甲
C.腹甲
D.内壳
E.贝壳
参考答案:C
—How do you like the film Titanic?
—I must say it’s _______ film I _______.
A.the better; have seen
B.good; had seen
C.the best; have seen
D.the best; had seen
单轴转塔自动车床有______个横刀架。
A.2
B.3
C.4