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【简答题】
在1L0.2000mol·L -1 HCl溶液中，需加入多少毫升水，使稀释后的HCl溶液对CaO的滴定度T CaO/HCl =0.00500g·mL -1 。已知M(CaO)=56.08g·mol -1 。
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举一反三
【单选题】Which of the following is the most appropriate title for the passage, based on its content?
A.
The Japanese phone culture.
B.
Culture and technology.
C.
All alike, all different.
D.
Handy, if you are thrifty.
【简答题】在绝热刚性容器中, H 2 ( g ) 和 Cl 2 ( g ) 生成 HCl( g ) , Δ f H m [HCl( g )] = -92.31kJ·mol -1 ,则该过程 Q ____ 0 , W ____ 0 , Δ U ____ 0 , Δ H ____ 0 。(填入>,<或=)
【简答题】在以下各个过程中,分别判断 Q , W ,Δ U 和Δ H 是 大于零、小于零,还是等于零。 (1) 理想气体的等温可逆膨胀; (2) 理想气体的绝热、反抗等外压膨胀; (3) 1mol 实际气体的等容、升温过程; (4) 在绝热刚性的容器中, H 2 (g) 与 Cl 2 (g) 生成 H Cl(g) ( 设气体都为理想气体 ) 。
【单选题】The questions in this group are based on the content of a passage. After reading the passage, choose the best answer to each question, Answer all questions following the passage on the basis of what i...
A.
Going Boldly Where No One Has Gone Before: The Promise and Peril of Interstellar Space Travel
B.
The Day the Earth Stood Still: Why Interstellar Space Travel Is Essential to Human Survival
C.
The Wrath of Larson: Egbert Larson's Quest to Build an Interstellar Spacecraft
D.
Busted Flat in Beta Regulus: The Crushing Challenges of Interstellar Space Travel
E.
Say It Isn't So, Mr. Einstein: Egbert Larson's Challenge to the Theory of Relativity
【单选题】Which of the following is not right about Content-based Instruction?
A.
Language is text-based and discourse-based.
B.
Language is purposeful.
C.
All content areas are more useful as a basis for language learning than others.
D.
Students learn best when instruction addresses students' needs.
【简答题】Content-based Video Retrieval is the process of attaching content based __________ to video shots and is essential for content-based classification and retrieval.
【简答题】下列过程的△U(1)、△H(2)、△S(3)、△G(4)何者为零? (2) H2(g)和Cl2(g)在绝热的刚性容器中反应生成HCl(g)的过程 ;
【单选题】Based on the tone and content of the passage, it is most likely which of the following?
A.
A book review in a journal intended for astrophysics professionals
B.
A movie review in an entertainment industry publication
C.
A book review in a science magazine aimed at a general audience
D.
A book review in a newspaper
E.
A transcript. of a talk given at a science fiction convention dedicated to 'the poetry of space'
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