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【多选题】
在下列情况中,对结果产生正误差的是( )。
A.
C.以HCl标准溶液滴定某碱样。所用滴定管因未洗净、滴定时管内壁挂有液滴
B.
以K2Cr2O7为基准物、用碘量法标定Na2S2O3溶液的浓度时、滴定速度过快、并过早读出滴定管读数
C.
标定标准溶液的基准物质、在称量时吸潮了(标定直接法)
D.
EDTA标准溶液滴定钙镁含量时、滴定速度过快
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【简答题】About 12,000 years ago- long before the famous UFO crash make headlines in America—an alien spaceship crashed in China. And their descendants are still living in a faraway Chinese village today! That ...
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【简答题】Judge whether the stresses of the following words are correct or not. Write Y for yes, N for no. 1. 'about 2. 'homeless 3. engi'neer
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【简答题】阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上（请注意每题词数要求）。 In the spring of 2013, Carly Zalenski's eyes were filled with tears as the dusty bus ran down a dirt road in southern Vietnam. The 14-year-old girl and her fam...
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【简答题】判断下列句子是否与短文内容相符，相符的填“T”，不相符的填“F”。 You may know the song Happy Birthday very well. But do you know who wrote this song and for whom it was written? Let me tell you a story. About one hundred years ago,...
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【单选题】다음을 잘 듣고 물음에 답하십시오. (请听下面的内容回答问题) 1) 들은 내용과 맞는 것은 몇 번입니까?
A.
친구와 같이 시내 구경하고 영화를 보았습니다.
B.
친구가 월요일 밤에 고향에 돌아갔습니다.
C.
나는 토요일에 고향에 갔습니다.
D.
주말에 고향의 친구가 왔습니다.
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【单选题】In the story of “On Aspirations”, Confucius shared _________’s idea.
A.
Zi lu
B.
Ran You
C.
Gongxi Chi
D.
Zeng Dian
查看完整题目与答案
【简答题】阅读理解。 Honestly, since my daughter was born, I have thought a lot about how to raise a child. I once heard a story that told about when a baby was born. The story said that when a baby was born, a new ...
查看完整题目与答案
【简答题】About 12,000 years ago- long before the famous UFO crash make headlines in America—an alien spaceship crashed in China. And their descendants are still living in a faraway Chinese village today! That ...
查看完整题目与答案
【简答题】Judge whether the stresses of the following words are correct or not. Write Y for yes, N for no. 1. 'about 2. 'homeless 3. engi'neer
查看完整题目与答案
【简答题】阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上（请注意每题词数要求）。 In the spring of 2013, Carly Zalenski's eyes were filled with tears as the dusty bus ran down a dirt road in southern Vietnam. The 14-year-old girl and her fam...
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