出现在网纹平面上与滚筒轴向垂直的条状印痕叫条痕。
参考答案:错
Come here, boys and girls! I have _______ to tell you.[ ]
A. something important
B. important something
C. anything important
D. important anything
润滑油箱润滑油位应在()之间。
A.1/3-1/2
B.1/3-2/3
C.1/2-2/3
D.1/2-3/4