单项选择题

鉴定物质的组成属于：（）。 A. 定性分析 B. 定量分析 C. 结构分析 D. 化学分析

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单项选择题

Suppose a typical worker in France can produce 32 units of product in an eight-hour day, while a typical worker in Germany can produce 30 units of product in a 10-hour day. We can conclude that
A、worker productivity in Germany is higher than in France.
B、the standard of living will likely be higher in France than in Germany.
C、productivity is 4 units per hour for the German worker and 3 units per hour for the French worker.
D、there will be no difference between the standard of living in France and Germany.

单项选择题

A、11
B、12
C、-11
D、-12