对某市的温度进行测量，结果为25、23、31、28、29（摄氏度）……_爱下问搜题

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问题单项选择题

对某市的温度进行测量，结果为25、23、31、28、29（摄氏度）……这是一组（）数据。

A.定比

B.定类

C.定距

D.定序

答案

参考答案：B

完形填空

Last summer I was a volunteer at a shelter (避难所)for the homeless, a place for homeless people to sleep at night. I wasn’t working that summer and was 36 only two classes in summer school, so I had some 37 time.
Three nights a week, I 38 in the kitchen of the shelter along with four other volunteers. We planned and 39 for 45 people hot meals 40 vegetables, chicken, fish and fruit. The homeless people 41 this good food because many of them usually didn’t eat well.
I 42 this volunteer work, making 43 with the four volunteers in the kitchen. One was a very nice elderly housewife, one a movie actor, another a young teacher, and the other a college student, 44 me.
I talked to a lot of the homeless people at the shelter. Their life stories 45 me with sympathy (同情). Some of them had 46 with alcohol(酒精) or drugs while others only had bad 47 . One woman worked for almost 30 years for a small company, and 48 she lost her job. She looked for a 49 job, but couldn’t find one, for she was too 50 . She could do nothing but sell her furniture — sofas, chairs, and tables 51 she could pay for her food. The woman 52 on job hunting, but she 53 couldn’t find one. She had no money for her 54 and had to sleep in her car. Then she had to sell her car. Alone, afraid and 55 , she finally came to the shelter.

C．difficulties

单项选择题

G系汽油机高怠速排放污染物限值CO≤（），HC≤55ppm。

A、0.15%

B、0.16%

C、0.18%