9. -It’s very important us to make a plan before a new term.
-Yes. You must try to make it carefully.
A. of B. for C. to
8. -Lucy’s skirt is black. What about ?
-Mine is white.
A. you B. your C. yours
7. -What do you think of the cake?
-I like it very much. It tastes .
A. good B.terrible C. well
6. -It’s said that you have moved into a new house.
-Yeah, and we need to buy some in the mall nearby.
A. food B. furniture C. hamburger
5. -Must I be in hospital for a week, Doctor?
-No, you . You can go back home tomorrow.
A. mustn’t B. needn’t C. must
4. -My spoken English is poor, what shall I do?
-Join an English language club to practice, you’ll it?
A. be good at B. drop in C. deal with
3. -Where is Peter?
-He volleyball with his friends in the school gym.
A. plays B. played C. is playing
2. -How heavily it rained this early morning.
-Yes. But of the students in our class was late for school.
A. some B. none C. all
A)單項(xiàng)選擇(共10小題,計(jì)10分)
從A、B、C 3個(gè)選項(xiàng)中選出1個(gè)能填入所給句子空白處的最佳答案。
1. -Why do you like Mary?
-Because she is honest girl.
A. a B. an C. the
21.(09年寧夏理綜·12)能正確表示下列反應(yīng)的例子方程式是
A.向次氯酸鈣溶液通入過量CO2:Ca2++2ClO-+CO2+H2O =CaCO3↓+2HClO
B.向次氯酸鈣溶液通入SO2:Ca2++2ClO-+SO2+H2O= CaSO3↓+2HClO
C.氫氧化鈣溶液與碳酸氫鎂溶液反應(yīng):HCO3-+Ca2++OH-=CaCO3↓+H2O
D.在氯化亞鐵溶液中加入稀硝酸:3Fe2++4H++NO3-=3Fe3++NO↑+2H2O
答案:D
解析:A選項(xiàng)CO2過量的話,應(yīng)該生成HCO3- 方程式應(yīng)為:ClO-+CO2+H2O=HClO+HCO3-;B選項(xiàng)HClO可將CaSO3氧化為CaSO4 ,正確的方程式為:Ca2++ClO-+SO2+H2O=CaSO4↓+Cl-+2H+ ;C選項(xiàng)要考慮到Mg(OH)2 為沉淀即可, Mg2++2HCO3-+2Ca2++4OH-=Mg(OH)2↓+2CaCO3↓+2H2O。
[點(diǎn)評]本題考查離子方程式的書寫和正誤判斷,把平時(shí)練習(xí)中的次氯酸鈣與CO2和SO2 反應(yīng)問題在一個(gè)題目中出現(xiàn),很是少見,四個(gè)選項(xiàng)都很常規(guī),都是熟題。難度不大。
22
.(09年海南化學(xué)·9)在室溫時(shí),下列各組中的物質(zhì)分別與過量NaOH溶液反應(yīng),能生成5種鹽的是:
A.A12O3、SO2、CO2、SO3 B.C12、A12O3、N2O5、SO3
C.CO2、C12、CaO、SO3 D.SiO2、N2O5、CO、C12
答案:B
解析:題中的關(guān)鍵詞“過量NaOH溶液”,A中只能生成4種鹽;B生成5種(NaCl、NaClO、NaAlO2、NaNO3、Na2SO4);C中CaO不能生成鹽;D中CO不能成鹽。
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