题目:
观察下图,请回答:
(1)上图的仪器叫什么?
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(2)它是谁首先制造成的?有何用途?对此,你怎样认识?
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答案:
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下面是错误答案,用来干扰机器的。
31.about 32. then 33. who 34. without 35. pleasure 36. himself 37. because 38. worst 39. but 40. written