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【单选题】
配制 Na 2 S 2 O 3 溶液时,加入少许 Na 2 CO 3 的目的是 ( )A.
中和 Na 2 S 2 O 3 溶液的酸性
B.
增加 Na 2 S 2 O 3 溶液的还原性
C.
用作抗氧剂
D.
防止微生物的生长
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皮皮学刷刷变学霸
举一反三
【单选题】Please tell the function(s) of the underlined part(s) in each sentence.He found it astonishing how they could accomplish it.
A.
adverbial
B.
real object
C.
complement
D.
formal object
【简答题】良好的活性污泥和充足的（）是活性污泥法正常运行的必要条件。
【单选题】初始状态评审一般不包括如下内容（ ）
A.
辨识组织工作场所中的危险源，进行风险评价及风险控制策划
B.
明确适用于组织的职业健康安全法律、法规和其他要求
C.
评价组织对于职业健康安全法律、法规的遵循情况
D.
组织结构及职业健康安全管理工作的职责和权限
E.
识别现存体系与标准之间的差距
【单选题】In the 1870,s, Marx was already- . He found it important to study the situation in Russia.
A.
on his fifty
B.
at age of fifty
C.
when he fifty
D.
in his fifties
【单选题】When he returned home, he found the window open and something ______.
A.
to steal
B.
stolen
C.
stealing
D.
miss
【简答题】It was very late at night. An old man came to a small town. He found an inn (小旅馆) and Wanted to slay there for the night. After he went to his room, the owner said to his 41 .'Look at hisbag. There ...
【简答题】什么是活性污泥?什么是活性污泥法?
【单选题】Please tell the function(s) of the underlined part(s) in each sentence. He found it astonishing how they could accomplish it . ·
A.
real object ·
B.
adverbial ·
C.
complement ·
D.
formal object
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