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【单选题】
到目前分析化学经历了几次巨大变革A.
一次
B.
二次
C.
三次
D.
四次
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反馈参考答案：
举一反三
【单选题】The unemployment rate in this district_______ from 6% to 5% in the past two years.
A.
is falling
B.
has fallen
C.
was falling
D.
had fallen
【简答题】根据出版类型说出下列文献的类型: 《建筑材料》(ISBN 978-7-5625-2671-1)的文献出版类型是 ( )。
【简答题】根据出版类型说出下列文献的类型: 《机械密封通用规范》( GB/T 33509-2017 )的文献出版类型是( ) 。
【简答题】闽江上游的三大溪叫什么?在何处汇人闽江干流?
【简答题】短文填空，一空一词。 Welcome to Park District. This is a very busy district. There are many places 1 the neighborhood. If you go 2 New Street, you can see a 3 next to the pay phone. If you want to 4 shopping, t...
【单选题】The unemployment rate in this district_____from 6% to 5% in the past two years.
A.
has fallen
B.
had fallen
C.
is falling
D.
was falling
【单选题】The price of the houses in this district_________from 5% to 7% in the past two months.
A.
has fallen
B.
has been fallen
C.
was fallen
D.
was falling
【单选题】The unemployment rate in this district from 6% -- 5% in the past two years.
A.
has fallen
B.
had fallen
C.
is falling
D.
was falling
【简答题】根据出版类型说出下列文献的类型: 《一种洗碗机的自消毒系统》(A47L15/42) 的文献出版类型是( ) 。
【简答题】根据出版类型说出下列文献的类型: 《 建筑节能与低碳建筑 》(ISSN 1671-7341) 的文献出版类型 是( )。
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