在文言文中，“四则运算”具有自身的独特性，与现代汉语差异较大。请指出下列各句中所含的四则运算类型（加、减、乘、除），在括号内标示出来。
（1）奉命于危难之间，尔来二十有一年矣。（ ）
（2）与吾居十二年者，今其室十无四五焉。（ ）
（3）盖余所至，比好游者尚不能十一。（ ）
（4）秋公回头看时，乃是一个女子，年约二八。（ ）
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Questions from 36 to 40 are based on the following passage: China’s trade volume surged in 2010. The development wasn’t only in quantity, but also in quality — namely structure diversification.The European Union, the United States and Japan remained China’s top 3 largest trading partners in 2010.But trade volumes between China and other emerging economies increased also. Bilateral trade volumes between China and other BRIC nations — Brazil, Russia and India — all jumped more than 40 percent. That made India China’s tenth largest trading partner.Huang Guohua, Statistics Department Director of General Administration of Customs said “Trade volume between China and emerging economies increased faster than that with the traditional market. It indicates that China’s foreign trade is diversifying, and showing less dependence on the traditional partners. It’s a good way to reduce risks.”Data also shows that foreign trade volumes developed dramatically in China’s middle and western areas last year. Although the southern province of Guangdong still topped others in the total volume of import and export.Huang Guohua said “The export volume of middle and western areas surged over 40 percent year on year in 2010. The speed was 10 percentage points higher than the country’s total. It indicates that industrial structure has improved in these areas.”The import and export volume of private enterprises surged faster than the country’s average in 2010, with 47 percent year on year growth. Experts say China’s foreign trade development reduced dependence on foreign-funded enterprises.2010 imports and exports reached a historical high with a p sign that the country’s trade sector has shrugged off the global economic recession.
According to the passage, which enterprises surged faster than the country’s in 2010（）
A．state-owned enterprises
B．joint ventures
C．private enterprises
D．foreign-funded enterprises
乙药品批准文号为国药准字S20080010，其中S表示（）
A．化学药品
B．中药
C．生物制品
D．进口药品
E．进口药品分包装
换药室要求空气中的细菌总数（）
A.≤10cfu/m3
B.≤100cfu/m3
C.≤200cfu/m3
D.≤500cfu/m3
E.≥500cfu/m3
何谓超声波？它有哪些重要特性？
管道过热将导致（）
A.空气混合活门趋向全冷
B.空气混合活门趋向全热
C.组件自动关闭
D.引气跳开