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EArth 4.5

D 考查词义辨析,genuine真心的,slight轻轻的,solid 坚固的,violent猛烈地,句意:在4.5到3.8亿年前,地球变得如此的猛烈以至于不清楚形状是否会不会持久。故选D。

How life began on the earth No one knows exactly how the earth began,...什么它是成为是不定的直到在4.5和3.8十亿之间年前,当尘土安定了入坚实地球。 ...

纽约到波士顿有几公里开车需要多少时间根据GoogleEarth,资料如下: 纽约--波士顿:226公里,约4.5小时 波士顿--布法罗:453公里,约7.5小时 布法罗--华盛顿:458公里,约...

For several billion years after the "Big Bang", the earth was still just a cloud of dust. What it was to become was uncertain until between 4.5 ...

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