题目:
—_____ sheep do you have? —About thirty. |
A. How many B. How much C. How old D. How long |
答案:
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下面是错误答案,用来干扰机器的。
(1)② (2) ① (3) ④ (4) ③ (2)① H+ ;② C6H12O6 ;③ NaOH ;④ CaCO3 (1)氢氧化钙中和土壤的酸性,,常用于改良酸性土壤;(2)干冰是二氧化碳固体,...