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Self—employed private doctors who charge a fee each patient’s visit are the foundation of medical practice in the United States. Most doctors have contract relationship with one or more hospitals in the community. They send their patients to this hospital,which usually charges patients according to the number of days they stay and the facilities (operation room, tests, medicines that they use). Some hospitals belong to a city, a state or a government agency. Others are operated by religious orders (教会)or other non—profit groups. Some medical doctors are on salary. Salaried doctors may work as hospital staff (员工)members, or residents, who are often still in training . They may teach in medical schools, or be hired by corporations to care for their workers to work for the government’s Public Health Service. Doctors are among the best paid professionals in the United States. In the 1980s, it was not uncommon for medical doctors to earn incomes of more than $100,000 a year. Specialists, particularly surgeons, might earn several times that amount. Doctors list many reasons why they deserve to be so well rewarded for their work. One reason is the long and expensive preparation required to become a doctor in the United States. Most would—be doctors first attend college for four years, which can cost nearly $20,000 a year at one of the best private institutions. Then they attend medical school for four years. Tuition(学费)alone can more than $10,000 a year. By the time they have obtained their medical degrees, many young doctors are deeply in debt. They still face three to five years of residency(实习阶段) in hospital, the first year as an assistant. The hours are long and the pay is relatively low. Setting up a medical practice is expensive, too. Sometimes several doctors will decide to establish a group practice, so they can share the expense of maintaining an office and buying e quipment. These doctors also take care of each other’s patients in emergencies. Doctors work long hours and must accept a great deal of responsibility. Many medical procedures, even quite practiced many times, still involve risk. It is understandable that doctors want to be well—paid for making decisions which can mean the difference between life and death. 小题1:According to the passage, it is very unlikely that an American hospital is owned by . A.a church .com B.a corporation C.a city D.a state 小题2:The expenses for becoming a doctor are mainly spent on . A.schooling and retraining B.practice in a hospital C.facilities he or she uses D.education he or she receives 小题3:Sometimes several doctors set up a group medical practice mainly because . A.it’s difficult for one doctor to take care of too many patients B.they can take turns to work for long hours C.facilities may be too much of burden for one doctor to shoulder D.no one wants to take too much res ponsibility 小题4:The statement that fully expresses the author’s view towards US doctors’ payment is that . A.they deserve a very good payment for their expensive education and their responsibility B.it is reasonable for doctors to have a large income because their work is dangerous C.doctors should be better paid because they work long hours in bad conditions D.doctors have great responsibility, so it is understandable that they should be well paid
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【单选题】设文法G(S): S→aAcB|Bd A→AaB|c B→bScA|b 则下列选项中是句型aAcbBdcc的短语的是( )。
A.
Bd
B.
cc
C.
a
D.
b
【简答题】心交感神经兴奋时,其末梢释放(),和心肌细胞膜上的()受体结合,可使心率(),心缩力()
【单选题】下列各组物质中,不能按 (“→”表示一步完成)关系转化的是(  ) 选项 A B C D a NaOH HNO 3 HCl S b Na 2 CO 3 NO Cl 2 SO 3 c NaHCO 3 NO 2 HClO H 2 SO 4
A.
A
B.
B
C.
C
D.
D
【简答题】定义一个抽象的"Role"类,有姓名,年龄,性别等成员变量 1. 要求尽可能隐藏所有变量(能够私有就私有,能够保护就不要公有),再通过GetXXX()和SetXXX()方法对各变量进行读写。具有一个抽象的play()方法,该方法不返回任何值,同时至少定义两个构造方法。Role类中要体现出this的几种用法。 2. 从Role类派生出一个"Employee"类,该类具有Role类的所有成员(构造方法...
【单选题】下列各物质中,不是按 (“→”表示一步完成)关系相互转化的是(  ) 选项 a b c A Fe FeCl 3 FeCl 2 B Cl 2 NaClO NaCl C Si SiO 2 H 2 SiO 3 D HNO 3 NO NO 2
A.
A
B.
B
C.
C
D.
D
【简答题】交感神经末梢释放的神经递质为 ,其与心肌细胞膜上 受体相结合,可使心率 、心肌收缩力 、心传 导速度 ,从而使搏出量增加,血压 。
【简答题】心交感神经末梢释放 ,可使心率 。
【单选题】在给定条件下,下列选项所示的物质间转化均能实现的是( )
A.
Fe + Cl2( 点 燃)→ FeCl2 + NaOH(aq) → 2 Fe(OH)2 2
B.
S + O 2(点燃) → SO3 + H2O → 3 H2 22 SO4 4
C.
CaCO3(高温)→ 3 CaO +SiO 2(高温)→ CaSiO3 333
D.
NH3 +O 3 2(催化剂)→△→ NO + H2O → HNO 3 3
【多选题】下列各组物质,不能按下图(“→”表示反应一步完成)关系转化的是 选项 a b c
A.
S SO 3 H 2 SO 4
B.
SiO 2 Na 2 SiO 3 H 2 SiO 3
C.
AlCl 3 NaAlO 2 Al(OH) 3
D.
Cu CuO Cu(OH) 2
【单选题】设所有长度至少为 1 的位串组成的集合是 S,下列哪个选项不能定义函数 f:S→S?
A.
将非空位串作为输入,并将位串的反转作为输出
B.
接受一个非空位串作为输入,并将位串的最后一位,当作新的位串输出
C.
函数以非空位串为输入,以位串 “1”为输出
D.
函数以非空位串为输入,并将其中的前 2 位组成新的位串输出
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