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【多选题】
关于蛋白质亚基的描述正确的是( )A.
一条多肽链卷曲成的螺旋结构
B.
具有两条以上多肽链的蛋白质才具有亚基
C.
两条以上多肽链与辅基结合成的蛋白质
D.
每个亚基都有各自的三级结构
E.
两条以上多肽链卷曲成的二级结构
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举一反三
【单选题】Although he has not gone to college，he shouldn't ________ studying for his degrees.
A.
be prevented
B.
be stopped
C.
be kept from
D.
be protected from
【单选题】Studying shouldn't ______all of a child's leisure hours.
A.
include
B.
contain
C.
involve
D.
occupy
【简答题】Listening Comprehension Section B (填空题除第四题外, 每一空不要添加任何符号, 否则系统会判为零分) My ________name is Zoe. She helps me choose the classes that best suit me. I am so sleepy. I pulled an _____________ studyin...
【判断题】If you have no time for Shakespeare, for a basic look at philosopgy, for the continuity of the fine arts, for that lesson of man's development we call history-then you have no business being in colleg...
A.
正确
B.
错误
【简答题】阅读表达 阅读下面的短文,并根据短文后的要求答题. [1]Perhaps you are an average student with average intelce.However,you can receive better grades if you want.Yes,even students with average intelce can be top stude...
【简答题】阅读下面短文，并根据短文后的要求答题（请注意问题后的字数要求）。 [1]Perhaps you are an average student with average intelce. However, you can receive better grades if you want. Yes, even students with average intelce can b...
【简答题】He’s devoted his whole life to the __________ (protect ) of the rare animals.
【单选题】He is a businessman, and goes to the concert on the rare _____.
A.
condition
B.
situation
C.
occasion
D.
occasions
【单选题】If you have a chance _____ in a university, you shouldn't give it up. [ ]
A.
study
B.
studying
C.
to study
D.
studied
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