问题 选择题

上海交大研究团队于2011年初成功研发了百米级第二代高温超导带材,使我国跻身该技术领域国际先进行列.你认为超导材料不适合制作(  )

A.电炉丝

B.电动机线圈

C.计算机电子元件

D.输电导线

答案

A、电炉丝需要将电能转化为内能,电阻为0无法将电能转化为内能.符合题意.

B、电动机线圈是利用线圈传递电流,是利用电流的磁效应工作的.利用超导体工作的时候,没有能量的损失.不合题意.

C、电子元件工作时不需要发热,不合题意.

D、输电导线采用超导材料,可减少导线因发热而损失的电能.不合题意.

故选A.

填空题

语法填空

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空,并将答案填写在标号为1~10的相应位置上.

     Jane was walking round the department store. She remembered how difficult   1    was to choose a

suitable Christmas present for her father. She wished that he was as easy    2   ( please)  as her mother ,

who was  always  delighted with  perfume.

     Besides,shopping at this time of the year was not 3 pleasant experience: people stepped on your feet

or   4   ( push) you with their elbows(肘部) ,hurrying ahead to get to a bargain.

     Jane paused in front of a counter   5   some attractive ties were on display. " They are real  silk , " the

  assistant tried  to attract her. "Worth double the price. " But Jane knew from past experience that her

  6   (choose) of ties hardly ever pleased her father. Jane stopped where a small crowd of men had

gathered. She found some good quality pipes    7     sale. She did not hesitate for long : although her

father smoked a pipe only once in a while, she knew that this was a present which was bound to please  8  .

     When Jane got home , with her small but well-chosen present in her bag, her parents were already 

    9     table having supper. Her mother was excited. "Your father has at last decided to stop smoking , "

Jane      10     ( inform) .

计算题