将空间上不同地区和不均匀分布的、时间上不同时刻断续观测的各种常规和非常规气象资料利用

题型:单项选择题

问题:

将空间上不同地区和不均匀分布的、时间上不同时刻断续观测的各种常规和非常规气象资料利用数值预报模式进行综合处理,从而获取数值预报模式所需要的比较理想的初值。这方法叫做()。

A.谱方法

B.四维同化

C.变分法

D.有限元法

考点:民航飞行签派员考试航空气象航空气象题库
题型:单项选择题

黑盒测试方法是根据软件产品的功能设计规格说明书,通过运行程序进行测试,证实每个已经实现的功能是否符合设计要求。如果某产品的文本编辑框允许输入1~255个字符,采用()测试方法,其测试数据为0个字符、1个字符、255个字符和256个字符。

A.等价类划分

B.边界值分析

C.比较测试

D.正交数组测试

题型:单项选择题

光合作用的实质是[ ]

A.制造有机物、释放氧气、释放能量  

B.分解有机物、释放氧气、把光能转化成有机物中的能量  

C.制造有机物、释放二氧化碳,把光能转化成有机物中的能量  

D.制造有机物、释放氧气,把光能转化成有机物中的能量

题型:单项选择题

市售某发酵粉的包装袋上有如图所示说明:

称取该发酵粉5.4g放入烧杯中,再滴加稀盐酸至溶液显酸性,共用去稀盐酸25.4g,得到的液态混合物质量为28.6g(忽略C02在水中的溶解,杂质溶于水但不与稀盐酸反应放出气体).

(1)生成的C02的质量为______g.

(2)通过计算,判断该发酵粉中Na2C03的质量分数是否与包装说明相符(计算结果精确0.1%)?

可能需要的相对原子质量:Na(23)、C(12)、O(16)、H(I)、Cl(35.5).

题型:单项选择题

A child who has once been pleased with a tale likes, as a rule, to have it retold in almost the same words, but this should not lead parents to treat printed fairy stories as formal texts. It is always much better to tell a story than read it out of a book, and, if a parent can produce what, in the actual situation of the time and the child, is an improvement on the printed text, so much the better.

A charge made against fairy tales is that they harm the child by frightening him or making him sad thinking. To prove the latter, one would have to show in a controlled experiment that children who have read fairy stories were more often sorry for cruelty than those who had not. As to fears, there are, I think, some cases of children being dangerously terrified by some fairy story. Often, however, this arises from the child having heard the story once. Familiarity with the story by repetition turns the pain of fear into the pleasure of a fear faced and mastered.There are also people who object to fairy stories on the grounds that they are not objectively true, that giants, witches, two-headed dragons, magic carpets, etc. do not exist; and that, instead of being fond of the strange side in fairy tales, the child should be taught to learn the reality by studying history. I find such people, I must say so peculiar that I do not know how to argue with them. If their case were sound, the world should be full of mad men attempting to fly from New York to Philadelphia on a stick or covering a telephone with kisses in the belief that it was their beloved girl-friend. No fairy story ever declared to be a description of the real world and no clever child has ever believed that it was.

The author’s mention of sticks and telephones is meant to suggest that()

A. fairy stories are still being made up

B. there is some misunderstanding about fairy tales

C. people try to modernize old fairy stories

D. there is more concern for children’s fears nowadays

题型:单项选择题

竖向预留钢筋校正中对中心位置偏差超过10mm的插筋根据图纸采用()冷弯校正。

A.1:3

B.1:4

C.1:5

D.1:6

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