相邻两个（或三个）零件的剖面线方向相反，或者方向一致但（）不等。
A、大小
B、长短
C、粗细
D、间距
参考答案：D
A series of stimulus policies and supportive measures taken by the government ________ to promote
change in the economic environment in this area. [ ]
A. is expected
B. are expected
C. is expecting
D. are expecting
I found a story-book on the desk, it isn’t mine, it is ___,I think.
A．her
B．she
C．yours
D．mine
