预定时间标准法
参考答案：
把人们所从事的所有作业都分解成基本动作单元，对每一种基本动作都根据它的性质与条件，经过详细观测，制成基本动作的时间表。
荀子《劝学》中的“青， ， ”，后来演变为“青出于蓝而胜于蓝”；韩愈在《师说》中与此语意思相类似的话是“是故 ， ， ， ”。
In a certain flower shop, which stocks four types of flower there are
as many violets as carnation，and
as many tulips as violets．If there are equal numbers of roses and tulips，what percent of the flowers in the shop are carnations
as many violets as carnation，and 
as many tulips as violets．If there are equal numbers of roses and tulips，what percent of the flowers in the shop are carnations