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【单选题】
下列化合物中同时含有伯、、叔、季碳原子的是:( )
A.
2,2,3-三甲基丁烷
B.
2,2,3-三甲基
C.
2,3,4-三甲基
D.
3,3-二甲基
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举一反三
【单选题】His efforts to bring about reconciliation between the two parties______.
A.
came off
B.
came on
C.
came round
D.
came down
【简答题】采集并向ECU输送信息的装置是 。
【单选题】如果得知与会外宾来自美国和英国,那么会议饮料应该提供( )。
A.
牛奶
B.
橙汁
C.
绿茶
D.
咖啡和红茶
【简答题】Li Ming won the first prize in the speech contest and I’m glad that his efforts at last _____. paid off  B. worked out  C. got back  D. turned out
【简答题】The best title for the passage would be ________. A) Apple’s Efforts to Stay Ahead of IBM B) Apple’s New Computer Technology C) Apple’s New personal Computers D) Apple’s Research Activities
【判断题】系统管理学派认为,组织是一个由相互联系的若干要素组成、为环境所影响并反过来影响环境的开放的社会技术系统。
A.
正确
B.
错误
【简答题】g____a____o____do one’s utmost, spare no efforts
【单选题】All efforts of cloning an animal will be ________ if there is not enough diversity in the group to overcome illness.
A.
in need
B.
in place
C.
in vain
D.
in case
【简答题】You may be spending far too many of your present moments in efforts to win the approval of others, or in being concer ned with some disapproval that you have encountered.We all enjoy applause, complim...
【简答题】如图所示为人体内部分生理过程示意图,其中A、B、C表示物质,①、②表示过程.请回答: (1)食物所含的六类营养成分中,不经过过程①直接进行过程②的有机物是______. (2)在观察活体材料时,发现某血管只允许甲细胞单行通过,那么,该血管在结构上适于物质交换的特点是______. (3)在肺泡内发生气体交换后,血液发生的变化是______.物质B进入乙细胞后的作用是______. (4)除A外,人...
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