应及时开胸探查的是
A.严重闭合性气胸B.开放性气胸C.张力性气胸D.进行性血胸E.多根多处肋骨骨折
参考答案:D
短文改错(共10小题;每小题1分,满分10分)
Last Sunday morning, when I was having a walk in the park near my home, I came across a crew make a new film with one of my favorite actor. I didn’t have my camera with me at that time, but I rushed back home to get. Unfortunately, by the time I got back, they have finished the scene and the actor couldn’t be seen everywhere. I was really disappointing and about to leave when he walked out a building. He was right there in the front of me! I couldn’t believe my luck—not only did I had my photo taken with him, but he signed his name on my shirt!
如图所示,小车的质量为m0,人的质量为m,人用恒力F拉绳,若人和车保持相对静止,不计绳和滑轮质量及车与地面的摩擦,则车对人的摩擦力可能是
A.0
B.F,方向向右
C.F,方向向左
D.F,方向向右