题目内容

细菌生长繁殖的条件

A. 适宜的温度
B. 充足的营养物质
C. 必要的气体
D. 合适的酸碱度
E. 活细胞内

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细菌的营养物质主要有

A. 水
B. 碳
C. 氮
D. 无机盐
E. 生长因子

Tea is a ________ of the remotest time in China.

A. staple food
B. beverage
C. dish
D. soup

How long is the history of Chinese tea ?

A. 2, 000 years.
B. 3, 000 years.
C. 4, 000 years.
D. 5, 000 years.

According to historical research, Chinese emperor and herbalist, ________ was the first one who discovered tea?

A. Shennong
B. Lu Yu
C. Emperor Qianlong
D. Cha Jing