问题
选择题
下列离子方程式书写正确的是[ ]
A、在氯化铝溶液中加入过量氨水 Al3＋+3OH- =Al(OH)3↓
B、在硫酸铜溶液中加入过量氢氧化钡溶液 Ba2＋+SO42- = BaSO4↓
C、氯气和水反应 Cl2+H2O=2H＋+Cl-+ClO-
D、将过氧化钠投入水中，2Na2O2 + 2H2O === 4Na＋+ O2↑ + 4OH-
答案
答案：D
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下列离子方程式书写正确的是[ ]
A、在氯化铝溶液中加入过量氨水 Al3＋+3OH- =Al(OH)3↓
B、在硫酸铜溶液中加入过量氢氧化钡溶液 Ba2＋+SO42- = BaSO4↓
C、氯气和水反应 Cl2+H2O=2H＋+Cl-+ClO-
D、将过氧化钠投入水中，2Na2O2 + 2H2O === 4Na＋+ O2↑ + 4OH-
答案：D
The car，running along the welllit road now sank in darkness.I broke the ____ on purpose，____ that the driver was too tired to drive.“When do you go back home in the evening？”“9 o’clock after this ____.” “Then when do you come out in the morning？” I ____ another question.“9 o’clock，too—just as if I worked at an office.” His __ surprised me，because every time I ride a taxi，what I ___ from the driver are only complaints that they have to work from morning till night，it’s hard to earn money and they’re often ___ by the police，or that their leaders are seated lazily，___ the fruits.But this driver told me，“I find it ____ to be a section chief as I was before.I like driving just for ____.It’s fortunate that I hardly drive ____ a passenger.So I earn two or three thousand yuan a month with ease.Yes，I never ____ an empty taxi.If it goes southward，I go northward.If it goes along a ____，I turn into a narrow street.” His words showed his ____ with his life and the pride he ____ in his job.Such feelings are so rare among people nowadays as oxygen in high ____.As an ancient saying goes，“Neither joy in material ____ nor grieve(悲痛) over personal setbacks.” How many people nowadays can show high ideals by ____ living and go far with a calm mind？I couldn’t help feeling ____ when finding such a state of mind in a stranger on a cold ___.
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