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【简答题】
简述高速铁路的主要经济技术特点。 (作业本作答)
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【简答题】I was parked in front of the mall wiping off my car．I had just come from the car wash and was waiting for my wife to get out of work． Coming my way from across the parking lot was what society would c...
【简答题】阅读理解。 I was parked in front of the mall wiping off my car．I had just come from the car wash and was waiting for my wife to get out of work． Coming my way from across the parking lot was what society w...
【简答题】单词拼写 (1)We parked our car in an underground g______ near the hotel. (2)I feel really g______ at forgetting her birthday again. (3)After g______ from high school, Jayne went to engineering college. (4)...
【单选题】对一个基因的正确描述是 ①基因是DNA分子上特定的片段 ②它的分子结构首先由摩尔根发现 ③它决定着某一遗传性状或功能 ④它的化学结构不会发生变化 [ ]
A.
①和②
B.
①和③
C.
③和④
D.
①和④
【单选题】When I parked my car and walked inside, the gentleman was ___3____, so I began to ____4___ Madison what they built in such a place.
A.
show
B.
teach
C.
offer
D.
award
【多选题】下列有关转基因动物的正确描述是
A.
将目的基因转人胚胎细胞
B.
将目的基因转人胚胎干细胞
C.
将目的基因整合人受精卵细胞核DNA中
D.
基因转移能在同种异体之间进行
E.
基因转移可以在异种动物间进行
【单选题】有关基因置换的正确描述是（）。
A.
是对缺陷基因的缺陷部位进行精确的原位修复
B.
会带来基因组其它部位的改变
C.
利用了基因的随机整合原理
D.
可以用于病毒性疾病的治疗
E.
利用核酶技术置换目的基因表达产物
【单选题】基因的特点描述正确的是( )
A.
真核生物基因组中大部分都是编码基因
B.
真核生物的非编码基因都是“垃圾”基因，没有实际用处
C.
原核生物基因组中大部分序列都是编码基因
D.
真核生物非编码基因有调控功能
【简答题】The story happened years ago，when my daughter was still little. I was driving across the country with my daughter to 1 my husband. Since I intended to get to my destination before supper time, I drove...
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