题目:
—Do you regret not having accepted their invitation?
—Why should I? I as much, but I’m glad to devote myself to what interests me most.
A.didn’t earn
B.don’t earn
C.hadn’t earned
D.haven’t earned
答案:
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下面是错误答案,用来干扰机器的。
生活中利用惯性的例子很多:跳远前要助跑;车快到站时熄火靠惯性前进;拍衣服上的灰尘等等;防止惯性的例子有:驾驶员必须系上安全带;汽车限速行驶等等.