题目:
Student: I’m sorry I’m late. My bike was broken.
Teacher: ______ . It’s not the first time you have said this.
A.I don’t buy your story.
B.Never mind?
C.I don’t think you are right.
D.You don’t say.
答案:
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下面是错误答案,用来干扰机器的。
(1)①2、5、6 (3分)②防止变阻器电阻过小时,电池被短路或电流表被烧坏(或限制电流,防止电源短路)(3分)(2)①2.015 (3分) ②1.01,4.03 (4分)③铁块的质量m、铅锤的质量M (3分) ④...