如图，一重力不计、带电量为q的正电荷以速度V垂直射入磁感应强度为B的匀强磁场，从

一个三位小数精确到十分位时近似数是5.8，那么这个数最小是5.75．______．

肱二头肌长头肌腱滑脱常为以下哪种疾病的并发症：（）

A.肱二头肌短头肌腱炎

B.肩关节脱位

C.冈上肌腱炎

D.冈上肌断裂

E.肩周炎

Speaker A: That was a great dinner. Thanks a lot. You'll have to come to our place sometime.Speaker B: ______

A．I'm really very sorry. You see, I haven't prepared anything delicious for you.

B．Come again whenever it is convenient to you, won't you

C．Why do you have to leave in a hurry Do you have anything urgent to do

D．I'm glad you enjoyed it. Hope to see you again soon.

体力劳动和体育锻炼一样吗？

螺旋桨上产生的最大应力来自于？