安全监控设备必须定期进行调试、校正,每()至少1次,每7天必须对甲烷超限断电功能进行测试。
A.周
B.旬
C.月
D.季
参考答案:C
根据图片提示内容,用适当的单词完成下列句子。
1 2 3
4 5
1. My father is a doctor. He works in the _______.
2. There is a ________ near our school.
3. My uncle lives in a ________ in the country.
4. I usually do my homework in my ________.
5. When you go hiking, wear ________ to keep your eyes.
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