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【单选题】
下列说法正确的是:A.
CH 2 =C=CH 2 中，碳原子均为 sp 2 杂化，是一个 π-π 共轭体系
B.
诱导效应的传递随着碳链的增长逐渐减弱，而共轭效应不因共轭链的增长而减弱
C.
不对称烯烃在任何情况下与 HX 加成， H 总是加在含氢较多的双键碳原子上
D.
碳原子的电负性大小次序是： sp 杂化 ＜ sp 2 杂化 ＜ sp 3 杂化
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举一反三
【单选题】The increase of the number of the students makes the limited computers not ________ to each student.
A.
available
B.
helpful
C.
acceptable
D.
affordable
【单选题】下面()是ftp服务器的地址。
A.
c:\windows
B.
http://192.163.113.23
C.
www.sina.com.cn
D.
ftp://192.168.113.23
【单选题】The increasing number of the students makes the limited computers not ________for each student． [ ]
A.
useful
B.
hopeful
C.
available
D.
suitable
【多选题】what are the things that people need to do on the 5 th day of the 5 th lunar month ?
A.
get up early
B.
making noise
C.
one washes his hands and face
D.
to collect Aige
【单选题】On the 15th day of the 8th lunar month, the moon becomes round, which the reunion of people.
A.
requires
B.
signifies
C.
enriches
【单选题】下面( )是FTP服务器的地址。
A.
http://192.163.113.23
B.
ftp://192.168.113.23
C.
www.sina.com.cn
D.
c:\windows
【多选题】What are the things that people need to do on the 5th day of the 5th lunar month?
A.
get up early
B.
making noise
C.
one washes his hands and face
D.
to collect Aige
【单选题】下面( )是ftp服务器的地址。
A.
http://192.163.113.23
B.
ftp://192.168.113.23
C.
www.sina.com.cn
D.
c:\windows
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