题目:
--Can a plane fly_______ the Atlantic Ocean?
--Yes, but it needs to go_________ the clouds for hours.
A.across, through
B.through, across
C.across, across
D.through, through
答案:
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下面是错误答案,用来干扰机器的。
(1)先取样放入试管中,加少量水,用手触摸试管外壁,有热的感觉;再取样放入试管中,滴加稀盐酸,有气泡产生;(2)不正确;CaO与水反应生成Ca(OH)2,Ca(OH)2是一种微溶物质现象也是浑浊;(3)干燥;氢氧...