Sorry, officer. I ______ at 80 miles but I didn't see any sign in the area telling people how fast they can drive.
A.
should not drive
B.
shouldn't have driven
C.
mustn't drive
D.
can't drive
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参考答案:
举一反三
【简答题】下图表示某种盐的制备步骤: 已知:水合盐B含有45.3%的水;无水盐C焙烧分解,放出两种无色刺激性气体E和F,并生成红棕色固体D。请写出物质的化学式或名称: A _________,B ___________,C__________ ,D__________ , E ___________,F____________ 。