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【单选题】
嘌呤核苷酸从头合成的特点是?A.
先合成嘌呤碱，再与磷酸核糖结合
B.
先合成嘌呤碱，再与氨基甲酰磷酸结合
C.
在磷酸核糖焦磷酸的基础上逐步合成嘌呤核苷酸
D.
在氨基甲酰磷酸基础上逐步合成嘌呤核苷酸
E.
不消耗能量
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【简答题】Introduction: William is a sales manager of D & G Company and he calls to learn some information about a trade fair. At the trade fair he talks to a visitor, Mr. Lock. He introduces the advantage fe...
【简答题】张家村与村毗邻，村的用水取自流经张家村的小河，多年来两村经常因用水问题发生冲突。2001年春，为从根本上解决问题，县政府决定将这条小河的水流交给乡水管 站统一调配。张家村人认为：该河历史上就属于张家村所有，县政府无权将这条河的水流交乡水管站统一调配，遂将县政府告上法院。 根据宪法和有关法律，下列哪一说法是正确的？（ ）
【单选题】The trade fair is designed to facilitate further cooperation between Chinese auto industries and overseas auto industries.
A.
promote
B.
protect
C.
preserve
D.
prolong
【单选题】Why do many companies choose to display their products at the trade fair?
A.
Because the number of people is usually greater.
B.
Because they can expand the scale of their company.
C.
Because the trade fair help recruit new employees.
D.
Because they can research on customers' profile.
【判断题】Before considering the following before deciding on attending a trade fair: Is this an international, national, or regional trade fair? Will the product/ service of the company fit in this trade fair?...
A.
正确
B.
错误
【简答题】What is the reason for the popularity of the trade fair? The popularity due to their ______ and save of traveling time.
【单选题】I'll finish the job , no matter ________ it takes.
A.
what
B.
when
C.
how long
D.
how far
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