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【简答题】
影响电泳分离的主要因素？电泳分离蛋白质的原理是什么？
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举一反三
【单选题】we use from ...to we use until
A.
with the duration of time
B.
with the time
C.
with days
D.
with period of the day
【多选题】有关路堤填筑的方式，下列说法正确的是______。
A.
不同土质混合填筑时应分层，每种填料层累计总厚不宜小于1m
B.
不因潮湿影响而变更其体积的优良土应填在上层，强度较小的土应填在下层
C.
河滩路堤填土，路堤与护道应分别填筑
D.
透水性较小的土填筑于路堤下层时，应做成4%的双向横坡
E.
原地面纵坡为15%的地段，可采用纵向分层法施工
【简答题】We live on the earth. We use the sea around us. What do we take from the ocean? And what do we give to it? We take fishes from the ocean—millions of kilograms of fish, every year, to feed millions of ...
【简答题】一个企业的成功，一个团体的成功，最重要的是：() A管理人 B服务人 C选对人 D组好队
【单选题】听力原文：M: In our science classes we use kilos, but we use pounds and ounces in everyday life. W: Your country also uses inches, feet and yards, doesn't it? Q: What are they discussing? (13)
A.
Weights and measures.
B.
The government.
C.
The cost of living.
D.
Science classes.
【简答题】We use them when we are watching TV.
【简答题】Complete the sentences with have to, must, don't have to or mustn't . We use when the speaker thinks it is necessary. We use when the situation makes something necessary. We use to say that doing some...
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