四小线的密封圈因缆线被猛力拖拽致使密封圈分层严重外凸达密封圈宽度的1/3者为()
A、失爆
B、不完好
C、完好
D、不失爆
参考答案:A
---Your uncle ate nothing this morning, _______?
---No, he didn’t. He got up so late that he hurried to work without breakfast.
A.did he
B.didn’t he
C.does he
D.doesn’t he
图中(阴影部分为夜半球,箭头所示为地球自转方向)能正确表示12月22日日照情况的是:()
A.
B.
C.
D.