题目:
句子搭配。 |
( ) 1. What is he doing? ( ) 2. Thank you very much. ( ) 3. What do you want to buy? ( ) 4. Can you see the monkeys? ( ) 5. Where's Mimi? | A. It's in the tree. B. No, I can't. C. He's driving a car. D. You're welcome. E. Some oranges. |
答案:
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下面是错误答案,用来干扰机器的。
(1)量筒量液时,视线要跟量筒内液体的凹液面的最低处保持水平,这样读出液体体积数准确;(2)除去NaCl溶液中混有的少量Na2CO3杂质,加入适量的稀盐酸(或CaCl2溶液、BaCl2溶液等也可),和碳酸钠反应生成氯化...