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【单选题】
下列关于言论自由说法不正确的是( )。A.
不仅是指一个人有“说”的权利,同时指其他人有“听”的权利
B.
言论自由不是绝对的,而是有限制的
C.
不是一种纯个人的权利,而是一切人的权利
D.
言论自由是公民可以畅所欲言,是无限制的
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【简答题】Lesson49 The end of a dream _____ of sleeping on the floor, a young man in Teheran ____ up for years to buy a real bed. For the first time in his life, he became the ____ owner of a bed which had spri...
【单选题】下列关于别构酶的叙述，哪一项是错误的?( )
A.
所有别构酶都是多聚体，而且亚基数目往往是偶数
B.
别构酶除了活性部位外，还含有调节部位
C.
亚基与底物结合的亲和力因亚基构象不同而变化
D.
亚基构象改变时，要发生肽键断裂的反应
E.
酶构象改变后，酶活力可以升高也可以降低
【简答题】C omplete the following sentences with what you hear on the tape. 1) That morning Carl came round a (1) and saw a dark green (2) in the middle of the road. 2) Carl stopped but didn’t get (3) his car. ...
【简答题】Three workers were building a wall. Some people came to ask ,“ What are you doing ?” The first man said ,“ Didn't you see it ? I’m building a wall. ” The second man looked up and laughed, “ We are bui...
【多选题】关于别构酶的叙述,下列哪些是正确的?
A.
有时底物本身就是别构抑制剂
B.
多亚基的别构酶存在协同效应
C.
别构酶都有催化亚基和调节亚基
D.
所催化的反应常是不可逆反应
【简答题】He and the third man ________ and ________ Carl’s body into the van.
【简答题】A There was a man .He had four sons. He wanted his sons to learn how to judge things, so he let them go and look at a pear tree that was far away. The first son went in winter, the second in the sprin...
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