问题 选择题

下列基态原子的外围电子排布式中,正确的是[ ]

A.3d94s2

B.3d44s2

C.3d104s0

D.3d84s2

答案

答案:D

填空题
改错题
 
短文改错。
      
     Not too long ago, people can't go scuba diving on
Hainan Island, or anywhere else. This were because  
there was no machine allowing  person to breathe    
under water for long time. In 1943 Jacques
Cousteau and his friend made it possible by invent the scuba    
machine. Cousteau was very interested on diving        
deep into the sea, but wanted to be an explorer. He    
bought a ship and used them to explore under the sea.
He also was liked to make videos. As he explored
the sea, he took pictures and videos of many thing that  
people had never seen before.  
1.                                                
2.                                                
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5.                                                
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8.                                                
9.                                                
10.