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【单选题】
Reading Comprehension Today TV audiences all over the world are accustomed to the sig
A.
11:Reading Comprehension Today TV audiences all over the world are accustomed to the sight of American astronauts in tip-top condition, with fair hair, crew-cuts, good teeth, an uncomplicated sense of humour and a severely limited non-technical vocabulary. What marks out an astronaut from his earthbound fellow human beings is something of a difficult problem. Should you wish to interview him, you must apply beforehand, and you must be prepared for a longish wait, even if your application meets with success. It is, in any case, out of the question to interview an astronaut about his family life or personal activities, because all the astronauts have con- tracts with an American magazine under conditions forbidding any unauthorized disclosures about their private lives. Certain obvious qualities are needed. Any would be spaceman must be in perfect health, must have powers of concentration ( since work inside a spacecraft is exceptionally demanding) and must have considerable courage. Again, space-work calls for dedication. Courage and dedication are particularly essential. In the well-known case of the Challenger seven crew members lost their lives in space because of the faulty equipment in the shuttle. Another must is outstanding scientific expertise. It goes without saying that they all have to have professional aeronautical qualifications and experience. A striking feature of the astronauts is their ages. For the younger man, in his twenties, say, space is out. Only one of the fifty men working for NASA in 1970 was under 30. The oldest astronaut to date is Alan Shepard, America's first man in space, who, at nearly fifty, was also the man who captained Apollo 13. The average age is the late thirties. The crew members of Apollo 11 were all born well before the Second World War. In 1986 the Challenger astronauts had an average age of 39. The range was from 35 to 46. In a society where marital continuity is not always exhibited, the astronauts' record in this respect hits you in the eye. Of all the married men in NASA group, only two or three are divorced from their wives. Mind you, it is hard to tell whether something in the basic character of an astronaut encourages fidelity or whether the selection process demands that a candidate should be happily married. The NASA astronauts live in unattractive small communities dotted here and there around the base in Texas. You would expect them to find their friends from among their professional associates, but this is not the case. Rather, they prefer to make friends with the normal folk in their districts, A good job, too, Astronauts, like everybody else, must get fed up with talking shop all the time, and, whereas they are indeed an elite, their daily life outside work should be as normal as possible, if only for the sake of their families. As for the astronauts' political leanings, they seem to be towards the right. This may be due to the fact that a large proportion of the astronauts have a military background. On the other hand, it could be just coincidence. In politics, astronauts are generally A.democrats.
B.
republicans.
C.
conservatives.
D.
communists.
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【简答题】阅读下面程序,程序执行结果为( )。 #include int main() {int i=3,j=2,k; k=i+j; { int k=8; if(i==3) printf("%d",k); else printf("%d",j); } printf("%d\n",k); return 0; }
【单选题】下列是M受体阻断剂的是
A.
阿托品
B.
新斯的明
C.
解磷定
D.
酚妥拉明
E.
毛果芸香碱
【单选题】变截面流量计的优点不包括()
A.
读取流量方便
B.
直观性好
C.
能量损失小
D.
测量范围不大
【单选题】下列M胆碱受体阻断剂中,极性大小从强到弱排列正确的是
A.
东莨菪碱>阿托品>樟柳碱>山莨菪碱
B.
东莨菪碱>山莨菪碱>樟柳碱>阿托品
C.
山莨菪碱>樟柳碱>阿托品>东莨菪碱
D.
东莨菪碱>樟柳碱>阿托品>山莨菪碱
E.
山莨菪碱>阿托品>樟柳碱>东莨菪碱
【单选题】阅读下面程序: int i = 3; int j = 2; if (i == j) Console.WriteLine(" 相等! "); else Console.WriteLine(" 不相等! "); 执行程序后,结果为 ( ) 。
A.
相等!
B.
不相等!
C.
编译错误
D.
程序可以执行但没有结果
【判断题】变截面流量计的优点包括读取流量方便,直观性好,能量损失小,测量范围大。
A.
正确
B.
错误
【判断题】变截面流量计的优点包括读取流量方便,直观性好,能量损失小,测量范围大。
A.
正确
B.
错误
【单选题】阅读下面程序: int i = 3; int j = 2; if (i = j) Console.WriteLine(" 相等! "); else Console.WriteLine(" 不相等! "); 执行程序后,结果为 ( ) 。
A.
相等!
B.
不相等!
C.
编译错误
D.
程序可以执行但没有结果
【单选题】阅读下面的程序: list_demo = [1, 2, 1, 3] nums = list.sort() for i in nums: print( i, end="") 程序执行结果:为( )。
A.
1213
B.
3211
C.
3121
D.
1123
【单选题】下列药物中,对外周扩血管作用的选择性最高的M受体阻断剂是
A.
阿托品
B.
东莨菪碱
C.
山莨菪碱
D.
毛果芸香碱
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