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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

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6. This is the very film ___________ I have long wished to see.

A. which               B. that                  C. who                    D. whom

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5. The reason _______ he explained to us was quite simple.

A. why                B. that                  C. how                    D. when

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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

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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

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2. People in Yuxi are proud of they have achieved in the past ten years.

A. that                B. which                C. what                   D. how

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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

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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

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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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22.(10分)(1)第二周期第VA族(2分)

(2) N2+3H22NH3      (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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