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Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice. 'Welcome to the U. S. A. ! Major credit cards are accepted!' By the millions they are coming no longer the tired, the poor, the wretched masses longing for a better living. These are the wealthy. 'We don't have a budget,' says a biologist from Brazil, as she walks with two companions through New York City' s South Street.' We just use our credit cards.' The US has long been one of the world' s most popular tourist destinations, but this year has been exceptional. First, there was the World Cup, which drew thousands from every comer of the globe then came the weakening of the US dollar against major currencies. Now the US, still the world' s superpower, can also claim to be the world' s bargain basement(廉价商品). Nobody undersells America these days on just about everything, from consumer electronics to fashion clothes to tennis rackets. Bottom retail prices anywhere from 30 % to 70% lower than those in Europe and Asia have attracted some 47 million visitors, who are expected to leave behind $ 79 billion in 1994. That' s up from $ 74 billion the year before. True, not everyone comes just for bargains. There remains an undeniable fascination in the rest of the world with all things American, nourished by Hollywood films and US television series. But shopping the USA is proving irresistible. Every week thousands arrive with empty suitcases ready to be filled some even rent an additional hotel room to hold their purchases. The buying binge(无节制)has become as important as watching Old Faithful Fountains erupt in Yellowstone Park or sunbathing on a beach in Florida. The US has come at last to appreciate what other countries learned long ago: the pouring in of foreign tourists may not always be convenient, but it does put money in the bank. And with a trade deficit at about $130 billion and growing for the past 12 months, the US needs all the deposits it can get. Compared with American tourists abroad, visitors to the US stay longer and spend more money at each stop an average of 12.2 night and $ 1624 a traveler versus the Americans' four nights and $ 298. From what the Brazilian biologist says, we know that tourists like her______.
A.
are reluctant to carry cash with them
B.
simply don' t care how much they spend
C.
are not good at planning their expenditure
D.
often spend more money than they can afford
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【简答题】电路如下图所示,已知稳压管的VZ= 7.3 V,正向导通电压VD(on)= 0.7 V,D3、D4为理想二极管,VREF1 = 5 V,VREF2= 10 V。分析该电路性能,当输入信号Vi=8V时,输出Vo=________V。【图片】
【单选题】患者女,22岁。因误服敌百虫引起农药中毒,双侧瞳孔缩小,排尿有大蒜味,来门诊后立即采用洗胃清除毒物,最佳的洗胃液是
A.
蛋白水
B.
1:20000高锰酸钾
C.
2%~4%碳酸氢钠
D.
镁乳
E.
3%过氧化氢
【单选题】机械式按键组成的键盘,应消除按键抖动,以下关于消抖错误的是?
A.
软件去抖,就是调用延时程序
B.
硬件去抖,常用RS电路去抖
C.
有硬件去抖和软件去抖2种方式
D.
软件去抖,不需要在程序中设置
【简答题】如图所示, V 为理想二极管,当 Vi=12V 时, V0=______V ,当 Vi=36V 时, V0=______V 。
【简答题】如题 44 图所示为具有放大作用的半波整流电路, V1 、 V2 为理想二极管。当 Vi ≥ 0 时, Vo = ,当 Vi < 0 时, Vo=。
【单选题】患者马丽云,女, 22 岁。因误服敌百虫引起农药中毒,双侧瞳孔缩小,排尿有大蒜味,来门诊后立即采用洗胃清除毒物,最佳的洗胃液是
A.
镁乳
B.
蛋白水
C.
3 %过氧化氢
D.
1:20000 高锰酸钾
E.
2‰ ~ 4 %碳酸氢钠
【单选题】患者女,22岁,因误服敌百虫引起农药中毒,双侧瞳孔缩小,排尿有大蒜味,来门诊后立即插鼻胃管行洗胃术清除毒物,成人插鼻胃管插入深度为
A.
15-25 cm
B.
20-30 cm
C.
25-35 cm
D.
45-55 cm
E.
60-70 cm
【单选题】 电路如图所示,图中二极管为理想二极管, 当输入电压Vi=0V时,输出电压Vo=( )V; 当输入电压Vi=20V时,输出电压Vo=( )V。
A.
0V,20V
B.
0V,3V
C.
3V,20V
D.
0V,10V
【单选题】、一般电压降小于( ),表示所测量的电路无接触不良的情况?。
A.
0.10V
B.
0.12V
C.
0.14V
【单选题】品牌战略的制定与实施本身具有风险性,以下不属于此类风险的是()。
A.
个别交差产品使核心产品名誉受影响
B.
多元品牌中缺乏明星品牌导致核心竞争力不足
C.
品牌文化的冲突导致品牌并购的失败
D.
品牌战略保持稳定性和长期性
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