题目内容：
How long have astronomers studied the planets and other objects in space? 参考答案：
答案解析：
简答题：How long have astronomers studied the planets and other obje
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第（10）题
第（10）题
直线Z的方程为X-Y-2=0，它关于点(1，-4)的对称直线方程为 ( )
直线Z的方程为X-Y-2=0，它关于点(1，-4)的对称直线方程为 ( ) A．X+Y-8=0 B．X+Y-12=0 C．X+Y+12=0 D．X+Y+8=0
We can draw a conclusion from the text that
We can draw a conclusion from the text that A．oil-price shocks are less shocking
根据下面资料，回答题 Could the bad old days of economic decline be abo
根据下面资料，回答题 Could the bad old days of economic decline be about to return? Since
第（36）题
第（36）题