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【单选题】
Most people buy a lot of gifts just before Christmas. But some people think they buy too much. They have started a special day called Buy Nothing Day. They don’t want anyone to go shopping on that day.Buy Nothing Day is November 29th. It’s 25 days before Christmas. The idea for Buy Nothing Day started in Vancouver, British Columbia. Now people all over the United States celebrate Buy Nothing Day. In California, parents and children get together to read stories, sing songs and paint pictures. The children talk about why they don’t need a lot of toys.This year in Albuquerque, New Mexico, high school students wanted to tell other students about Buy Nothing Day. They organized a simple dinner to give people information about Buy Nothing Day. They asked restaurants in the neighborhood to donate the food. They made posters and talked to other students about it. The dinner was a big success, and many students agreed not to buy anything on November 29th. The students at the high school liked the idea of this new tradition. Next year, they want to have another dinner to inform more people about Buy Nothing Day!Question: To make Buy Nothing Day more popular, the students in Albuquerque plan to ______.
A.
provide free food to more people
B.
persuade more restaurants to donate food
C.
put up more advertising posters on that day
D.
have another dinner to inform more people of the day
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【单选题】x05a02043当换热器中冷热流体的进出口温度一定时,判断下面的说法中哪一个是错误的:
A.
逆流时,Δtm一定大于并流,错流或折流时Δtm;
B.
采用逆流操作时可以节约热流体或冷流体的用量;
C.
采用逆流操作可以减少所需的传热面积;
【单选题】最易受极端值影响的标志变异指标是
A.
全距
B.
A · D
C.
D.
【单选题】哪一种狗的尾巴是下垂的?
A.
金毛
B.
雪纳瑞
C.
八哥
D.
哈士奇
【单选题】(单选)当换热器中冷热流体的进出口温度一定,且两流体均不发生相变时,如下说法错误的是 :
A.
逆流时的Δtm一定大于并流,错流或折流时的Δtm
B.
采用逆流操作可以减少所需的传热面积
C.
采用逆流操作时可以节约热流体(或冷流体)的用量
D.
采用并流可以保护热敏性物料
【简答题】为什么农牧交错带是生态建设的重点和关键区域。
【单选题】4 现场总线的特点主要体现在两方面:一是在体系结构上实现了( ),二是实现了现场设备智能化和控制系统分散化。
A.
串并混合连接
B.
异构连接
C.
并行连接
D.
串行连接
【简答题】为什么农牧交错带是生态建设的重点和关键区域。
【单选题】当换热器中冷热流体的进出口温度一定,且两流体均不发生相变时,如下说法错误的是 :
A.
逆流时的Δtm一定大于并流,错流或折流时的Δtm
B.
采用逆流操作可以减少所需的传热面积
C.
采用逆流操作时可以节约热流体(或冷流体)的用量
D.
采用并流可以保护热敏性物料
【判断题】与他人比赛并获得成功能够帮助人们获得更多的个人成就感,合作就做不到这一点。
A.
正确
B.
错误
【单选题】最易受极端值影响的标志变异指标是
A.
极差
B.
标准差
C.
四分位差
D.
离散系数
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