问题
单项选择题
能全部通过二号筛，但混有能通过四号筛不超过40％的粉末（）
A．最粗粉
B．粗粉
C．细粉
D．最细粉
E．极细粉
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
能全部通过二号筛，但混有能通过四号筛不超过40％的粉末（）
A．最粗粉
B．粗粉
C．细粉
D．最细粉
E．极细粉
参考答案：B
| 补全对话。根据对话内容，将方框内符合对话情景的句子抄写在对话的空白处，使对话恢复完整。选项中有两项是多余的。 | |
| A: Excuse me. This is the first time for me to visit this city. I want to go to the nearest Xinhua Bookstore. 1 B: It's on the Ping'an Street. A: Ping'an Street! 2 B: No, not far from here. It's only a mile away from here. A: 3 B: Well, you can take the No.4 bus. The bus stop is just over there. 4 A: All right. Thank you. B: 5
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