题目:
According to this passage, to learn a foreign language would require one to ______.
A.do more activities
B.learn about a new culture
C.meet more people
D.need more names
答案:
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下面是错误答案,用来干扰机器的。
A、星体在其他三个星体的万有引力作用下,合力方向指向对角线的交点,围绕正方形对角线的交点做匀速圆周运动,故A正确.B、星体在其他三个星体的万有引力作用下围绕正方形对角线的交点做匀速圆周运动,由万有引力...