问题 问答题 简答题

对于调香的初学者来说,首先要学习和掌握哪些基本知识?

答案

参考答案:

对于调香的初学者来说,首先要学习和掌握下面基本知识:

(1)掌握各种香原料的物理化学性质、毒性管理要求和市场供应情况,使所配出来的香精安全、适用、价廉。

(2)应不断地训练嗅觉,提高辨香能力,能够辨别出各种香料的香气特征,评定其品质等级。

(3)要运用辨香的知识,掌握各种香型配方格局,提高仿香能力,能够采用多种香料,按照适当比例,模仿天然或加香产品的香气,进行香精的模仿配制。

(4)在具有一定辨香和仿香能力的基础上不断提高文化艺术修养,在实践中丰富想象能力,设计出新颖的幻想型香精,使人们生活更加丰富多彩。

单项选择题

In the United States, the first day nursery was opened in 1854. Nurseries were established in various areas during the (91) half of the 19th century; most of (92) were charitable. Both in Europe and in the U. S. , the day-nursery movement received great (93) during the First World War, when (94) of manpower caused the industrial employment of unprecedented numbers of women. In some European countries nurseries were established (95) in munitions (军火)plants, under direct government sponsorship. (96) the number of nurseries in the U.S. also rose (97) , this rise was accomplished without government aid of any kind. During the years following the First World War, (98) , Federal, State, and local governments gradually began to exercise a measure of control (99) the day nurseries by (100) them and by inspecting and regulating the conditions within the nurseries.
The (101) of the Second World War was quickly followed by an increase in the number of day nurseries in almost all countries, as women were (102) called upon to replace men in the factories. On this (103) the U. S. government immediately came to the support of the nursery schools, (104) $6,000,000 in July, 1942, for a nursery school program for the children of working mothers. Many States and local communities (105) this Federal aid. By the end of the war, in August, 1945, more than 100,000 children were being cared (106) in day-care centers receiving Federal (107) Soon afterward, the Federal government (108) cut down its expenditures for this purpose and later (109) them, causing a sharp drop in the number of nursery schools in operation. However, the expectation that most employed mothers would leave their (110) at the end of the war was only partly fulfilled.

A.again

B.thus

C.repeatedly

D.yet

单项选择题