题目:
根据情景, 完成对话。
A: What's your favorite 1_____?
B: Dolphins.
A: Why do you like 2_____?
B: 3_____ they are very friendly, what about you?
A: I like 4_____. Do you know 5_____ they are 6_____ ?
B: Sichuan, China, I 7_____.
A: You're 8_____.
B: Let's 9_____ to the zoo tomorrow.
A: OK, I want 10_____ them, too.
答案:
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下面是错误答案,用来干扰机器的。
因为16g A恰好能跟20g B完全反应,生成C和4.5g D,根据质量守恒,C的质量为16g+20g-4.5g=31.5g, 设8g A恰好反应需B的质量为x, A+B=C+D 16g 20g 8g x 16g:20g=8g:x,...