题目

如图所示,小车沿水平面做直线运动,小车内光滑底面上有一物块被压缩的轻弹簧压向左壁,小车向右加速运动。若小车向右加速度增大,则小车左壁受物块的压力N1和小车右壁受弹簧的压力N2的大小变化是( ) A . N1不变,N2变大 B . N1变大,N2不变 C . N1、N2都变大 D . N1变大,N2减小 答案:BThe book which ______ at the end of last year turned out to be a great success in Shanghai. A.came about B.came up C.came out D.came around
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