题目

下列关于核外电子排布的说法不正确的是（    ）A.第n电子层中最多可容纳的电子数为2n2B.第二电子层中最多可容纳的电子数为8C.最多可容纳8个电子的电子层一定是第二电子层D.最多可容纳2个电子的电子层一定是第一电子层 答案：C解析：当第3、4、5、6、7等电子层作为最外电子层时，其能容纳的最大电子数目也是8。 完形填空 　　It was three in the afternoon and I was putting my baby to sleep when the phone rang．It was a little girl asking for the Goldstein family．“　　1　　,” I said, “you've got the wrong number．”　　2　　 the phone didn't stop ringing．Each time it was the voice of a little girl．She was 　　3　　 one call after another, each time asking for the Goldstein family．My baby wouldn't stop crying．I started to lose my 　　4　　．I left the phone 　　5　　 the hook for about an hour, certain that this would 　　6　　 her．But as soon as I put the phone back on the hook, she 　　7　　!I started to cry．After about the tenth call I told her that if she called one more time I would call the 　　8　　．At 6∶30 pm, the phone rang for about the 25th time．I picked it up, but remained 　　9　　．I could hear the same voice of a girl．What kind of 　　10　　 would allow her to do this all the afternoon! I 　　11　　 to speak to her mother．To my 　　12　　, she called her mother to the phone．I told the mother what her little girl had been doing to me all the 　　13　　．The mother assured me that this was the 　　14　　 phone call her daughter had made that day．“My daughter's teacher gave all the girls in the class the phone number of their new teaching 　　15　　．The entire class of 30 girls was told to call the new assistant to find what time their class would be．The teacher must have given them the wrong number 　　16　　!” 　　Until about 9∶00 pm, the phone 　　17　　 rang from time to time．Each time, it was a little girl wanting to know what time the class was! Some girls, even after hearing they had the wrong 　　18　　, would anyway ask if I knew the time! I would just 　　19　　．It had turned into a joke now! I would 　　20　　 have thought that an entire class of girls, all with the same voice, was calling me! (1) [　　] A． Stop B． Sorry C． Fine D． OK (2) [　　] A． Then B． So C． But D． And (3) [　　] A． making B． returning C． receiving D． sending (4) [　　] A． hope B． interest C． sense D． temper (5) [　　] A． at B． on C． off D． above (6) [　　] A． discourage B． frighten C． puzzle D． connect (7) [　　] A． arrived B． called C． appeared D． returned (8) [　　] A． school B． director C． neighbors D． police (9) [　　] A． angry B． calm C． silent D． serious (10) [　　] A． operators B． parents C． teachers D． mothers (11) [　　] A． refused B． started C． preferred D． demanded (12) [　　] A． surprise B． disappointment C． joy D． satisfaction (13) [　　] A． day B． night C． afternoon D． morning (14) [　　] A． first B． last C． second D． easiest (15) [　　] A． plan B． assistant C． course D． advisor (16) [　　] A． on purpose B． in advance C． by mistake D． for the moment (17) [　　] A． still B． sure C． always D． just (18) [　　] A． place B． information C． address D． number (19) [　　] A． cry B． laugh C． complain D． wait (20) [　　] A． almost B． yet C． already D． never