如果太阳突然变成一个黑洞,地球轨道会发生什么变化?

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问题:

如果太阳突然变成一个黑洞,地球轨道会发生什么变化?

考点:天文学天文学题库
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根据中文提示,写出正确的单词。

Uncle John is from_____小题1:____(澳大利亚). But he can   小题2:   (说) English, Chinese and Japanese.  He     小题3:   (教)English in a school of Shanghai. Uncle John likes to  小题4:   (锻炼)every day. He thinks it’s    小题5:  (重要的)to keep healthy. He usually rides his    小题6:   (自行车)to work. He ___小题7:_____(也)likes to make dinner for his three children. He always says that delicious food makes    小题8:  (我们)happy. He keeps a    小题9:   (宠物) dog, and everyone thinks his dog is lovely and     小题10:  (聪明的). It can sing and dance. It can walk on two legs. I want to visit Uncle John this summer vacation.

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试述抗体筛选的重要性及其所用试剂的红细胞。

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在国家安全工作中,下列哪项权利是国家安全机关不能行使的?()

A.拘留

B.起诉

C.预审

D.侦查

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某程序的程序图如图4—9所示,运用McCabe度量法对其进行度量,其环路复杂度是()。

 

A.2

B.3

C.4

D.5

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操作条件反射学说的提出者是巴甫洛夫。( )

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