【简答题】物体A 、 B 都静止在同一水平面上,它们的质量分别为m A 、 m B , 与水平面间的动摩擦因数分别为μ A 、 μ B , 用平行于水平面的拉力F分别拉物体A和B所得的加速度与拉力F的关系图象分别如图中的A 、 B 所示,则由图像可知 A. 物体与水平面间的摩擦力大小相等 B.μ A m B C.μ A >μ B ,m A
【简答题】Read the passage and match the paragraphs with the subtitles below. 阅读以下短文,给每个段落匹配合适的标题。 Congratulations, you are finally employed! You are all set to go! But wait, you just started this new position ...
【简答题】有一从水池中引出的等直径的水平水管如图所示,已知L=6m,H=3m,管径d=0.15m。今将末端阀门突然打开,由于水池较大,认为池中水位保持不变,不计水头损失,试求:
【单选题】What do you do now?
A.
I’m a full-time student.
B.
No, I don’t, but I learn really fast.
【单选题】—Nick, what do you do now?—I joined the editorial staff of a local newspaper, ______I have contributed to various monthlies.