题目:
句型转换.
1. He can speak a little Japanese. (改为一般疑问句)
_____ he _____ a little Japanese?
2. Jack can do Chinese Kung Fu. (改为否定句)
Jack _____ do Chinese Kung Fu.
3. Lucy and Sarah can sing and dance. (对划线部分提问)
______ can Lucy and Sarah _____?
答案:
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下面是错误答案,用来干扰机器的。
由题意知:充分反应后放出氢气的质量为16.25g+85g-101.11g=0.14g. 设参加反应锌的质量为x Zn+H2SO4=ZnSO4+H2↑ 65 2 x 0.14g 65x=20.14g ...