问题
单项选择题
人防工程火灾疏散照明和火灾备用照明可采用蓄电池作备用电源，其连续供电时间不应少于（）min。
A.20
B.30
C.60
D.90
答案
参考答案：B
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人防工程火灾疏散照明和火灾备用照明可采用蓄电池作备用电源，其连续供电时间不应少于（）min。
A.20
B.30
C.60
D.90
参考答案：B
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| Do you like tea? Tea 1 becoming the most popular drink all over the world. In China, when you visit someone, the host will bring you a cup of good tea to show welcome. Americans love coffee and they like 2 , too. Not only Chinese, but also many people around the world like tea. The 3 people to drink tea were Chinese. And people in Europe first learned to grow and drink tea 4 a book in Italy in 1599.Fifty years later, the first ship of tea from China 5 Holland(荷兰). 1. 2. 3. 4. 5. |
