斜导柱分型与抽芯机构中的()机构,需要有定距分型机构。
A.斜导柱在动模、滑块在定模
B.斜导柱在定模、滑块在动模
C.斜导柱和滑块都在定模
D.斜导柱和滑块都在动模
参考答案:C
The research mainly deals with the difficulty the students have ________ their attention on their
study all the time. [ ]
A. to focus
B. to be focused
C. focusing
D. focused
下列又称为不安抗辩权的是()。
A.同时履行抗辩权
B.先履行抗辩权
C.后履行抗辩权
D.不履行抗辩权