题目内容

参三七、云南白药属()

A. 凉血止血
B. 收敛止血药
C. 化瘀止血药
D. 温经止血药

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熟地、当归属()

A. 补阴药
B. 补阳药
C. 补气药
D. 补血药

Two-thirds of his property_____lost in the fire.

A. was
B. were
C. are
D. have been

William has cut his smoking_____to five cigarettes a day.

A. down
B. short
C. away
D. off

在关系数据库中,用来表示实体问联系的是()

A. 属性
B. 二维表
C. 网状结构
D. 树状结构

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