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【单选题】
1 Our heritage and our culture have caused most Americans to assume not only that our language is universal but that the gestures we use are understood by everyone. We do not realize that waving goodbye is the way to summon a Filipino to one's side, or that in Italy curling the finger in a beckoning motion is a gesture of farewell. 2 Those private citizens who sent packages to our troops occupying Germany after W. W. II and marked them GIFT to escape duty payments did not bother to find out that GIFT means poison in German. Moreover, we like to think ourselves as friendly, yet we prefer to be at least 3 feet or an arm's length away from others. Latins and Middle Easterners like to come closer and touch, which makes Americans uncomfortable. 3 Our linguistic and cultural nearsightedness and the casualness with which we take notice—when we do—of the developed tastes, mannerisms, customs and languages of other countries, are losing us friends, business and respect in the world. 4 Even here in the U. S. , we make few concessions to the needs of foreign visitors. There are no information signs in four languages on our public buildings or monuments we do not have multilingual guide tours. Very few restaurant menus have translations, and multilingual bank clerks and policemen are rare. 5 When we go abroad, we tend to cluster in hotels where English is spoken. The attitudes and information we pick up are conditioned by those natives—usually the more affluent—who speak English. Our business, as well as the nation's diplomacy, dealings are conducted through interpreters. 6 For many years, America and Americans could get by with cultural blindness and linguistic ignorance. After all, America was the most powerful country of the world, the dispenser of the needed funds and commodities, the peacemaker, the 'top banana' in the global cast. But all that is past. We are slowly beginning to realize that our proper role in the world is changing. The passage informs us that ______.
A.
Americans do not understand their own heritage and culture well
B.
the author does not mind Americans' cultural blindness
C.
Americans pay little attention to foreign customs and languages
D.
America has no problems in the world because it's the most powerful country
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举一反三
【单选题】对于剂量效应和剂量反应关系,下列说法错误的是
A.
剂量-效应关系是指外源化学物的剂量大小与其在个体或群体中引起的量效应之间的关系。
B.
剂量-反应关系是指外源化学物的剂量大小与其效应发生率之间的关系。
C.
这两个关系前者是表示群体的效应关系,后者表示个体的反应关系
【单选题】下面有关剂量效应关系和剂量反应关系说法中错误的是()
A.
前者指随着有害因素剂量的增加,机体内产生的有害生物学效应随之增强的关系
B.
后者指随着有害因素剂量增加,产生特定生物学效应的个体数随之增加的关系
C.
必需元素和一般化合物一样,有一个阈值,高于阈值会产生有害效应
D.
剂量反应关系常用百分数来表示,如发生率、反应率等
E.
一般化合物都属于阈值化合物,在大于其阈值时才产生效应
【判断题】一次风压控制系统中,在负荷比较小时,开大再循环档板以增加负荷。
A.
正确
B.
错误
【多选题】屋顶结构找坡的优点是( )。
A.
经济性好
B.
减轻荷载
C.
室内顶棚平整
D.
排水坡度较大
E.
施工简单
【多选题】屋顶结构找坡的优点是( )。
A.
经济性好
B.
减轻荷载
C.
室内顶棚平整
D.
排水坡度较大
【单选题】下列说法正确的是( )
A.
剂量一反应关系是针对群体
B.
剂量一效应关系是针对群体
C.
剂量一反应关系是针对个体
D.
剂量一效应关系既可针对群体也可针对个体
E.
剂量一反应关系既可针对群体也可针对个体
【单选题】It has a strange smell in your room. You'd better keep the window ______. [     ]
A.
open
B.
opens
C.
closes
D.
closed
【多选题】剂量效应和剂量反应关系的异同是()。
A.
在环境流行病学研究中常以暴露剂量来取代这两个关系中剂量
B.
在环境流行病学研究中不得以暴露剂量来取代这两个关系中剂量
C.
这两个关系前者是表示群体的效应关系,后者表示个体的反应关系
D.
这两个关系是一个概念
E.
这两个关系前者是表示个体的效应关系,后者表示群体的反应关系
【单选题】屋顶结构找坡的优点是( )。
A.
济性好          ②减轻荷载       ③室内顶棚平整       ④排水坡度较大
B.
①②
C.
①②④
D.
②④
E.
①②③④
【多选题】屋顶结构找坡的优点是( )。
A.
经济性能好
B.
减轻了屋面荷载
C.
室内顶棚平整
D.
排水坡度较大
E.
构造简单
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