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【简答题】
阅读短文,根据短文内容在空白处根据括号内单词的正确形式、首字母或汉语提示填入适当的内容。(每空一词) Dear Mr. Wang, On behalf of the Student Union, I am writing to 1 ) ____________ ( 邀请 ) you to give 2 ) ____________ (we) a speech on Chinese 3 ) ____________ (cultural) . The conference will 4 ) ____________ ( begin ) at 2:30 p . m . next Tuesday afternoon 5 ) ____________ Meeting Room 301. 6 ) ____________ would be our great 7 ) ____________ (honorable) if you can come and give the 8 ) ____________ . Please let us know 9 ) ____________ you can come before this Friday. We are 10 ) ____________ (look) forward to your reply. Sincerely yours, Jimmy Brown
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举一反三
【简答题】下列各图所示的实验原理、方法、装置或操作正确的是
【判断题】Secondary design consideration include structural stability, deformations, etc.
A.
正确
B.
错误
【单选题】Structural stability means the structure of an idiom is generally( ) .
A.
movable
B.
unstable
C.
unchangeable
D.
understandable
【简答题】实验是化学研究的基础，下列各图所示的实验方法、装置或操作正确的是 （ ）。
【判断题】Neutrons have essentially the same mass as protons. They contribute to the structural stability of the nucleus—if there are too many or too few, the nucleus may disintegrate by radioactive decay—but t...
A.
正确
B.
错误
【单选题】用标准浓度的盐酸滴定未知浓度的NaOH溶液，下列各操作（其他操作正确）中会造成测定结果偏低的是
A.
酸式滴定管尖嘴部分有气泡，滴定后消失
B.
滴定终点读数时俯视读数
C.
用蒸馏水洗净酸式滴定管后，装入标准盐酸进行滴定
D.
锥形瓶水洗后未干燥
【简答题】下列各图所示的实验操作中，正确的是
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