题目内容

附属元素(accessory element)

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产生IL-2的细胞是（）。

A. 巨噬细胞
B. T细胞
C. B细胞
D. NK细胞
E. 肥大细胞

管理的科学性是指:（）

A. 具有内在的规律性
B. 存在着普遍适用的管理理论、管理原理和管理方法
C. 有一套独立于其他学科分析问题、解决问题的科学方法
D. 存在最优的管理方法和思想

第48题应选：根据以下内容回答下面的题目，Many people believe they should drink eight glasses of water a day. That is 41 they have been told all their life. 42 a new report says people should drink as 43 water as they feel like drinking. The report does not 44 people how many gasses of water to drink. Instead,45 says women should get about 2.7 litres (升)of water a day,46 that men should get about 3.7 litres. In each 47 , that is more than eight glasses.As you might 48, the report says people need to drink more water 49 they are doing physical(体力的) work. The same is true of those who live in hot weather. These people could need much more water 50 others.第41题应选：

A. suggest
B. decide
C. expect

阐述蚕室的制造。