题目内容
（请给出正确答案）
B.had not been finished
C.not having finished
D.not finished
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更多“Sam offered us a lift when he …”相关的问题
Sam Wilson stamped the boxes of meat for the army with a large US for______.
A．Uncle Sam
B．United States
C．Soldiers
D．America
By referring to Sam's broken bicycle, the author intends to ______.
A．illustrate the ways to repair his bicycle
B．discuss the problems of his bicycle
C．tell us how to solve a problem
D．show us how simple it is to repair a bicycle
A.on
B.at
C.to
D.for
First the person must recognize that there is a problem. For example, Sam’s bicycle is broken, and he cannot read it to class as he usually does. Sam must see that there is a problem with his bicycle.
Next the thinker must define the problem. Before Sam can repair his bicycle, he must find out the reason why it does not work. For instance, he must determine if the problem is with the gears, the brakes, or the frame. He must make his problem more specific.
Now the person must look for information that will make the problem clearer and lead to possible solutions. For instance, suppose Sam decided that his bike does not work because there is something wrong with the gear wheels. At this time, he can look in his bicycle repair book and read about gears. He can talk to his friends at the bike shop. He can look at his gears carefully.
After studying the problem, the person should have several suggestions for a possible solution. Take Sam as an illustration. His suggestions might be: put oil on the gear wheels; buy new gear wheels and replace the old ones; tighten or loosen the gear wheels.
Eventually one suggestion seems to be the solution to the problem. Sometimes the final idea comes very suddenly because the thinker suddenly sees something new or sees something in a new way. Sam, for example, suddenly sees that there is a piece of chewing gum between the gear wheels. He immediately realizes the solution to his problem: he must clean the gear wheels.
Finally the solution is tested. Sam cleans the gear wheels and finds that afterwards his bicycle works perfectly. In short, he has solved the problem.
26.What is the best title for this passage？
A.Six Stages for Repairing Sam’s Bicycle
B.Possible Ways to Problem-solving
C.Necessities of Problem Analysis
D.Suggestions for Analyzing a Problem
27.In analyzing a problem we should do all the following except __________.
A.recognize and define the problem
B.look for information to make the problem clearer
C.have suggestions for a possible solution
D.find a solution by trial or mistake
28.By referring to Sam’s broken bicycle, the author intends to _________.
A.illustrate the ways to repair his bicycle
B.discuss the problems of his bicycle
C.tell us how to solve a problem
D.show us how to analyze a problem
29.Which of the following is NOT true？
A.People do not analyze the problem they meet.
B.People often accept the opinions or ideas of other people.
C.People may learn from their past experience.
D.People can not solve some problems they meet.
30.As used in the last sentence, the phrase “in short” means _________.
A.in the long run
B.in detail
C.in a word
D.in the end
A、LiF(200)、LiF(220)、Ge(111)、PE(002)、PX1
B、LiF(200)、LiF(220)、Ge(111)、PE(002)、PX2
C、LiF(200)、LiF(420)、Ge(111)、PE(002)、PX1
D、InSb、LiF(220)、Ge(111)、PE(002)、PX1
A.LIF-STAT3信号途径的激活
B.LIF与LIF受体α亚单位的结合
C.JAK激酶的活化
D.STAT3的去磷酸化
E.gp190与gp130的结合
血细胞发生的近距离调控
A.破骨细胞
B.GM-CSF，SC
F.IL-6.FNF和LIF等因子
C.血管细胞黏附分子-1
D.吞噬衰老红细胞
E.成骨细胞
下列分子或元素有具方向性化学键的是
(A) LiF(s) (B) NaCl(s) (C) Na(s) (D) I2(g)
