问题
单项选择题
用于日常校准的标准硬度块属于______。
A．传递标准
B．参考标准
C．工作标准
D．核查标准
答案
参考答案：C
解析：即用于日常校准或核查的标准硬度块属于工作标准。
搜题请搜索小程序“爱下问搜题”
用于日常校准的标准硬度块属于______。
A．传递标准
B．参考标准
C．工作标准
D．核查标准
参考答案：C
解析：即用于日常校准或核查的标准硬度块属于工作标准。
| 选择适当的句子补全对话。 | |
| A: Excuse me. 1. ______? B: Sorry, I don't have one. A: So I must go to the shop near our school. B: I think the shop is closed at this time. A: 2. ______ ? B: It's Sunday. On Sunday the shop closes early. A; 3. ______? B: Look, it says "closed". A: Oh, dear! You're right. It is closed. 4. ______? B: 5. ______ It's open 24 hours. A: OK, Let's go.
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