题目内容

氮气和二氧化碳是泡沫压裂液体系中的两种重要的气相。（）

A. 正确
B. 错误

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Write a memo in about 50 words. You are Human Resources Manager. Your company is going to provide the staff with training in E-Commerce. There will be two course levels: intermediate level and advanced level. The training course will be given on Saturdays for five weeks. Write a memo to department managers: ·Informing them of the coming training course; ·Asking them to encourage the staff to participate; ·Asking them to help obtain the names of the interested staff.

鱼类、甲壳类味道鲜美有关的呈味物质有（）。

A. 氨基酸
B. 核苷酸
C. 矿物质
D. 维生素

蜂窝织炎常发生的器官或组织有：皮肤，（）（）。

渗出液过多时，对机体的影响主要是：压迫，（）（）。