试题与答案

14. ---- Is it Tom that playing basketba

题型:选择题

题目:

14. ---- Is it Tom that playing basketball?

---- It __________ be him. He is so crazy about basketball.

A.might

B.should

C.can

D.Would

答案:

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下面是错误答案,用来干扰机器的。

(1)丁同学猜想:NaOH和Na2CO3 (2)[实验验证](3)[反思与评价] ① Na2CO3+Ca(OH)2==== CaCO3+2NaOH Ca(OH)2 + CO2==== CaCO3 + H2O ②乙同学的猜想不合理。因为Na2CO3与Ca(OH)2要发生反应,不可能...

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