材料一定,其他条件不变的情况下,零件的有效应力集中系数从1.5增加为3,则该零件的疲劳极限( )。
A.增加1倍 B.减小1倍C.增大2倍 D.不变
参考答案:B
私は風邪()頭が痛いです。
A.から
B.ので
C.に
D.で
Study the following picture carefully and write an essay entitled" Academic Falsification (欺诈) in China".
In the essay you should
1) describe the picture and interpret its meaning, and
2) give your comment on the topic.