美国和中国的文化截然不同。美国的女主人,当别人赞扬她的烹调技术时,很可能会说:“哦,

题型:单项选择题

问题:

美国和中国的文化截然不同。美国的女主人,当别人赞扬她的烹调技术时,很可能会说:“哦,你喜欢我就高兴,我是特地为你而做的”。而中国的女主人则会以一句“没有什么好吃的,都是一些家常便饭,不成敬意”。来向客人道歉。这段文字说明( )

A.美国女主人很会奉承、讨好人

B.中国女主人做的饭本身没有美国人做得好

C.中国人以谦为荣,美国人以直率为荣

D.各国的文化差异有所不同致使风俗习惯也不尽相同

考点:地方公务员行政职业能力测试国家公务员(行政职业能力测试)45
题型:单项选择题
计算:(
3
+1)2-(2-
3
)-1-
12
题型:单项选择题

图1是交流发电机模型示意图.在磁感应强度为B的匀强磁场中,有一矩形线圈abcd可绕线圈平面内垂直于磁感线的OO˝轴转动,由线圈引起的导线ae和df分别与两个跟线圈一起绕OO˝转动的金属圈环相连接,金属圆环又分别与两个固定的电刷保持滑动接触,这样矩形线圈在转动中就可以保持和外电路电阻R形成闭合电路.图2是线圈的主视图,导线ab和cd分别用它们的横截面来表示.已知ab长度为L1,bc长度为L2,线圈以恒定角速度ω逆时针转动.(只考虑单匝线圈)

(1)线圈平面处于中性面位置时开始计时,试推导t时刻整个线圈中的感应电动势e1 的表达式;

(2)线圈平面处于与中性面成φ0夹角位置时开始计时,如图3所示,试写出t时刻整个线圈中的感应电动势e2的表达式;

(3)若线圈电阻为r,求线圈每转动一周电阻R上产生的焦耳热.(其它电阻均不计)

题型:单项选择题

I watched as Dr. Ian Stead, the archaeologist in charge of the excavation, began carefully removing the peat with a clay modelling tool. X-rays taken through the box while it was at the hospital revealed ribs, backbone, arm bones and a skull (apparently with fractures). However, the bones showed up only faintly because acid in the peat had removed minerals from them.
Using the X-rays, Stead started on what he thought might be a leg. By his side was Professor Frank Oldfield, of Liverpool University, an expert on peat who could identify vegetation from stems only a fraction of an inch long. "Similar bodies found in bogs in Denmark show signs of a violent death," Stead said. "It is essential for us to be able to distinguish between the plant fibres in peat and clothing or a piece of rope which might have been used to hang him."
As Stead continued his gentle probing, a brown leathery limb began to materialize amidst the peat; but not until most of it was exposed could he and Robert Connolly, a physical anthropologist at Liverpool University, decide that it was an arm. Beside it was a small piece of animal fur — perhaps the remains of clothing.
Following the forearm down into the peat, Stead found a brown shiny object and then, close by, two more. Seen under a magnifying glass, he suddenly realized they were fingernails— "beautifully manicured and without a scratch on them," he said. "Most people at this time in the Iron Age were farmers; but with fingernails like that, this person can’t have been. He might have been a priest or an aristocrat." Especially delicate work was required to reveal the head. On the third day, curly sideburns appeared and, shortly afterwards, a moustache. At first it seemed that the man had been balding but gradually he was seen to have close-cropped hair, about an inch or two long.
"This information about his hairstyle is unique. We have no other information about what Britons looked like before the Roman invasion except for three small plaques showing Celts with drooping moustaches and shaven chins."
The crucial clue showing how the man died had already been revealed, close to his neck, but it looked just like another innocent heather root. It was not recognized until two days later, when Margaret McCord, a senior conservation officer, found the same root at the back of his neck and, cleaning it carefully, saw its twisted texture. "He’s been garr0tted." She declared. The root was a length of twisted sinew, the thickness of a p string. A slip knot at the back shows how it was tightened round the neck.
"A large discoloration on the left shoulder suggests a bruise and possibly a violent struggle," Stead said.

The researchers suspected the man had met a violent death because______.

A.(A) he was still wearing clothes

B.(B) similar bodies had been found elsewhere

C.(C) there were traces of a hanging rope in the peat

D.(D) he hadn’t been buried in a coffin

题型:单项选择题

下列爆炸现象中,属于化学爆炸的是( )。

A.高压蒸汽锅炉当过热蒸汽压力超过锅炉能承受的程度时,锅炉破裂,高压蒸汽骤然释放出来,形成爆炸
B.悬浮于空气中的粉尘(煤粉、面粉等)以一定的比例与空气混合时,在一定的条件下所产生的爆炸
C.陨石落地对目标的撞击等物体高速碰撞时,物体高速运动产生的动能,在碰撞点的局部区域内迅速转化为热能,形成爆炸现象
D.自然界中的雷电

题型:单项选择题

男士从工作场合换为社交场合只可以换条领带就可以了。

更多题库