问题
单项选择题 B1型题
用于分纯菌种（）
A.半固体培养基
B.液体培养基
C.固体培养基
D.营养培养基
E.令冻真空干燥
答案
参考答案：C
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用于分纯菌种（）
A.半固体培养基
B.液体培养基
C.固体培养基
D.营养培养基
E.令冻真空干燥
参考答案：C
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| China's mobile phone users are 1 to top 520 million at the end of this year, 2 the Ministry of Information Industry (MII,信息产业部). The prediction was made 3 the average (平均的) monthly rise of 5 million mobile subscribers in previous(前面的) years. 4 fixed-line (固定线路) users are expected to turn to cellphones as a 5 of falling prices of handsets and services, says the MII. The number of cellphone users 6 460 million at the end of 2006, 7 67.77 million year on year. On average, there are 35.3 cellphones in China for 8 100 people. China had its first mobile phone users in 1987 and it 9 ten years for the number of subscribers to reach 10 million. Four years later, the country had the 10 population of mobile phone subscribers in the world.
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