滚动轴承内圈与轴颈的配合以及外圈与座孔的配合,( )。
A.前者采用基轴制,后者选用基孔制
B.前者采用基孔制,后者采用基轴制
C.全部采用基孔制
D.全部采用基轴制
参考答案:B
毒物进入体内后,主要在那个器官代谢:()
A.肾
B.肺
C.肝
D.心
E.脑
Directions:
Write an essay of 160-200 words based on the following drawing. In your essay, you should
1) describe the drawing briefly,
2) explain its intended meaning, and then
3) give your comments.