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Blood pressure9) from person to person and from moment to moment.

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You have achieved a lot, developing new technologies, starting your own business, and giving money to10) .

2.According to the text, which of the following may NOT be so exciting for a foreigner who just arrived in a new country?

高炉炉渣的作用之一是使渣铁分离,其原因是炉渣具有熔点低,比重小和()。

A. 熔于生铁
B. 不熔于生铁
C. 与生铁互熔

炉渣碱度指炉渣中的碱性氧化物含量与酸性氧化物含量的比值,中等二元碱度为()。

A. CaO/SiO2
B. SiO2/CaO
CaO/Al2O3

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