7.-The experiment is of particular importance. -I see. We will carry on with it ________ we can get enough money. A. unless B. though C. whether D. until
6. This is the very film ___________ I have long wished to see.
A. which B. that C. who D. whom
5. The reason _______ he explained to us was quite simple.
A. why B. that C. how D. when
4. Perhaps _____ separates the successful people from others is _____ they live on purpose.
A. what; that B. that; that C. that; what D. what; what
3. My daughter likes to have her photos taken there are many different kinds of flowers.
A. there B. in which C. when D. where
2. People in Yuxi are proud of they have achieved in the past ten years.
A. that B. which C. what D. how
1. Honesty is a kind of quality and that’s it takes to communicate with others successfully.
A. why B. what C. how D. which
24.(8分)(1)氧化产物a是 Fe(NO3)3 b是Fe(NO3)2
(2)P=0.15
(3)n1=0.25 n2=0.3
23.(6分) H2SO4和HCl的物质的量浓度分别为0.1mol/l 0.2mol/l
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(10分)(1)第二周期第VA族(2分)
(2) N2+3H2
2NH3
(2分)
(3)离子键、非极性共价键(或离子键、共价键)(2分)
(4)NH4++OH-=NH3·H2O (2分)(写成加热,生成氨气和水也可)
(5)4Na2SO3=Na2S+3Na2SO4 (2分)
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