如图是篮球碰到运动员脸上时的情景,这说明力可以使物体_________。球撞在脸上脸会感觉到疼,同时球也会飞出去,这说明物体间力的作用是_________的。
形变,相互
A child is sent to the school nurse because, according to his teacher, he’s constantly scratching his head. When the nurse assesses his hair and scalp, she finds evidence of lice. What did she probably see
A. Flaking of the scalp with pink, irritated skin exposed.B. Small white spots that adhere to the hair shaft, close to the scalp.C. Scaly, circumscribed patches on the scalp, with mild alopecia in these areas.D. Multiple tiny pustules on the scalp with no abnormal findings on the hair shafts.
用哪种探头可提高轴向分辨率
A.高频探头
B.低频探头
C.较大的探头
D.低阻尼探头
E.高阻尼探头