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【单选题】
过滤BaSO4沉淀用（）A.
定性滤纸
B.
定量滤纸
C.
玻璃砂芯漏斗
D.
分液漏斗
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举一反三
【单选题】.Not ______ beautiful, the building is ______ now.
A.
looking, being built
B.
looked, being built
C.
being looked, building
D.
looking, built
【简答题】基因与启动子、增强子的关系是( ) A．少数基因只有启动子即可表达 B．多数基因只有启动子即可表达 C．少数基因只有增强子即可表达 D．多数基因表达依赖启动子、增强子同时存在
【简答题】Directions: Read the following text. Choose the best word or phrase for each numbered blank and mark A, B,C or D on, ANSWER SHEET 1. Western-style. conversations often develop quite differently from J...
【单选题】Look! The houses _________.
A.
is being built
B.
are building
C.
being built
D.
are being built
【简答题】从四个选项中，选出与所给句子画线部分意思相同或相近的选项。 1. We will be able to afford a new car next year. A. should B. can C. may D. must 2. Your schoolbag is similar to mine. I don't know which one to take. A. liking B. diffe...
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