—Jack, where is Tom? —He is in Mr. Smith's office now, sir. —Please tell him that I want to see her ______ she arrives. A. at the moment B. the moment C. in the moment D. For the moment 答案:B如图所示,水平桌面上的物体受到水平方向的力F1、F2和摩擦力的作用而处于静止状态,其中F1=10N,F2=2N。当撤去F1后,物体的受力情况及所处状态是A.物体所受合力为零B.物体受到的合力为6NC.物体将向左运动D.物体仍然静止