单项选择题

In the process of transforming an innovative competition plan from an idea into a real thing, new ideas will be generated, optimized and sublimated.

A.正确
B.错误
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单项选择题
Before designing the speech content of the project display, the theme of the speech must be clarified, and the entire presentation content should fit the theme.
A.正确
B.错误
单项选择题
In midsummer, the temperature inside a car parked outdoors rises sharply, making the air quality in the car poor. The on-board solar-powered ventilation and cooling system is designed, which not only makes full use of solar energy to provide energy for ai
r conditioning, but also reduces the internal temperature of the car.
A.正确
B.错误
单项选择题
关于石油气，以下说法不正确的是（）。
A.“石油液化气没有毒性”
B.“主要成分是丙烷、丁烷
C.石油液化气本身无色无臭
D.“从液态变成气态体积大约扩大100倍
单项选择题
The design of an energy-saving cleaning device for high-rise building exterior wall is based on the cavitation jet technique.
A.正确
B.错误
单项选择题
ofo has created a model of bicycle sharing with no piles.
A.正确
B.错误
多项选择题
色彩的象征性类型得三个层次是 A. 色彩的独立象征;如张艺谋的《大红灯笼高高挂》中灯笼和几个太太的服饰色彩; B. 色彩的独立象征;如张艺谋的《英雄》中不同段落的红、绿、蓝的基调; C. 局部象征;如张艺谋的《英雄》中不同段落的红、绿、蓝的基调; D. 整体象征;如张艺谋的《红高粱》中红色的革命精神;
单项选择题
淀粉在有一定温度下高温吸水，可显示（）。
A.弹性
B.可塑性
C.韧性
D.胶体性
单项选择题
In 2008, the first National University Student Social Practice and Science Contest on Energy Saving Emission Reduction was held at Zhejiang University.
A.正确
B.错误
单项选择题
In 1988, Tsinghua University set up its first Challenge Cup competition.
A.正确
B.错误
判断题
当发生食道异物时，异物停留于上段食管时疼痛最明显。
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