问题
不定项选择题
向NaBr、NaI、Na2SO3混合液中,通入一定量氯气后,将溶液蒸干并充分灼烧,得到固体剩余物质的组成可能是[ ]
A.NaCl、Na2SO4
B.NaCl、NaBr、Na2SO4
C.NaCl、Na2SO4、I2
D.NaCl、NaI、Na2SO4
答案
AB
向NaBr、NaI、Na2SO3混合液中,通入一定量氯气后,将溶液蒸干并充分灼烧,得到固体剩余物质的组成可能是[ ]
A.NaCl、Na2SO4
B.NaCl、NaBr、Na2SO4
C.NaCl、Na2SO4、I2
D.NaCl、NaI、Na2SO4
AB
阅读下面短文,把A-E 五个句子填入文中空缺处,使短文内容完整,正确。 | |
One night a foolish man looked down a well. The water at the bottom was like a mirror. 1 He ran home to get a hook. (铁钩) 2 The hook reached the water and the man tried to pull the hook. 3 The man pulled and pulled but the stone would not move. Suddenly the stone moved. 4 The man fell on to his back. He could see the sky, 5 "Good" he said, "I have put the moon back into the sky!"
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