题目内容
(请给出正确答案)
[单选题]
_______ chocolate cake we had last night was delicious.
A./
B.the
C.a
D.an
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A./
B.the
C.a
D.an
Mary was looking for a shop___________she could buy some chocolate
A.which
B.that
C.where
D.Who
Waiter: Welcome, sir. May I help you?
Customer: ______
A.Thank you. I'll have fried tofu and stir-fried cauliflower.
B.Yes, please. I'd like a hamburger and a chocolate shake.
C.Sorry. ! don't need your help, thank you.
D.If you want to help me, I'll be glad to accept it.
A.Ca(OH)2+CO2一→CaCO3+H20
B.CaO+H2O—→Ca(OH)2+CO2—→CaCO3+H2O
C.Ca(OH)2+CO2+nH2O—→CaCO3+(n+1)H2O
D.CaO+CO2—→CaCO3