以下关于重心及重力的说法中，正确的是（）

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A：一个物体放于水中称量时弹簧秤的示数小于物体在空气中称量时弹簧秤的示数，因此，物体在水中的重力小于在空气中的重力

B：据G＝mg可知，两个物体相比较，质量较大的物体的重力一定较大

C：当物体放于水平面上时，重力方向垂直于水平面向下，当物体置于斜面上时，其重力方向垂直于斜面向下

D：物体的形状改变后，其重心位置往往改变

上一题下一题 0.0难度选择题更新时间:2017-12-09 06:01:21

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D

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The Voice of China

Many Chinese like watching The Voice of China, because the songs sound really good. My daughter, my wife and I like it, too. We watch the programme(节目) every Friday. Some famous singers like Wang Feng, Zhang Huimei, Na Ying, Harlem Yu are the coaches. The coaches listen to the songs, and find their favorite singers. They can listen to the singers , but they can't watch the singers sing . Then they teach (教) their favorite singers. The singers sing songs again. The Voice of China is to find the best voice.

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