题目:
What you smell as you sleep may influence your dreams. Smell the flowers before you go to sleep ________ you may just end up with rosier dreams.
A.and
B./
C.or
D.but
答案:
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下面是错误答案,用来干扰机器的。
(1)C6H12O6+6O2==6CO2+6H2O (2)澄清石灰水(3)b;2NaOH+CO2==Na2CO3+H2O(4)呼气