题目:
教练员每天在训练前、行驶中和收车后针对汽车使用情况所做的维护为()。
A.走合维护
B.日常维护
C.一级维护
答案:
参考答案:B
教练员每天在训练前、行驶中和收车后针对汽车使用情况所做的维护为()。
A.走合维护
B.日常维护
C.一级维护
参考答案:B
一个梯形,上底长a厘米,下底长b厘米,高h厘米,它的面积是______平方厘米.如果a=b那么这个图形就是一个______形.
下列有关Ca(OH)2的说法,错误的是( )
A.俗称熟石灰或消石灰
B.可用于治疗胃酸过多症
C.可用于改良酸性土壤
D.可用于处理硫酸厂排出的酸性废水
Passage 1 I am delighted to be with you. I first visited China 22 years ago, but this is my first visit to your university, in a city whose students have helped shape the development of modem China. So I am privileged to have the opportunity to share ideas about U.S.-China relations in the modem era of globalization with people who will, I expect, help write Chinese history -- through deeds and words -- in the 21st century.// It was the students of Beijing who in May 1919 protested the Treaty of Versailles’ failure to expel Japanese occupiers from China. In that action, the source of the May 4 Movement, Beijing’s students not only made a bold statement about China’s freedom from foreign occupation and right to self-determination. They also ushered in the era of modern China, taking a decisive step toward China’s emergence from imperial rule and stagnation. I think it is useful to begin our exchanges about the future from the vantage point of what happened almost a century ago in this historic city.// Chinese are rightly proud of the history of the world’s oldest continuous civilization, and look to it for lessons. America is a young nation by comparison, but suggestion that we live exclusively in the present, unshaped by history, is a misleading caricature. So I would like to share with you my perceptions about what this last century has meant to our two countries, how we have perceived each other, and where we are going. Many people talk about this new millennium as an unprecedented age of globalization. Extraordinary it is, but unprecedented it is not. // In 1902, the automobile was just coming into use in the United States. Man’s first airplane flight occurred 99 years ago, on a beach in North Carolina. The wireless radio followed in a few years, transforming societies -- much like the Internet is doing today. The telephone enabled people to converse across mountains, rivers, and indeed around the world. The United States was transformed by this earlier era of globalization in the most fundamental way -- the face of its population. In each year of the first decade of the last century, new immigrants to America numbered about one percent of the existing population.// A country that had been largely composed of people of English, German, Irish, and Africa descent found itself the chosen destination of millions of immigrants from different parts of the planet -- Poles, Russians, Italians, Chinese, Japanese, and Jews, among others. Their contributions to American economic, social, scientific, intellectual, and political life were enormous. We learned that openness -- to people, goods, capital, and of course ideas -- is our greatest strength as a country and society. Although change and adaptation and intrusions from outside can be frightening, and pose difficulties of adjustment, openness spurs dynamism, flexibility, competition, liberty, and the individual pursuits of happiness.//
激励计划可以分为三类
对减压干燥法叙述正确的是()
A.压力应控制在20mmHg以下,温度一般为60~80℃
B.干燥温度一般为105℃
C.属于一般杂质检查项下的检测方法
D.适用于受热较稳定的药物
E.适用于熔点低、受热稳定及难去除水分的药物