⑴Is it hot?____                                                  A. It's on the second floor.

⑵What's the weather like in Beijing?____        B. It's warm and sunny.

⑶Where is the library?____                              C. Yes,we do.

⑷What time is it?____                                      D. No,it isn't.

⑸Do you have a computer room?____            E. It's 6 o'clock.

温度是表示物体 ____的物理量．常用的温度计是根据 ____性质来测量温度的．温度计上的符号℃表示采用的是 ____温度，它把 ____的温度规定为0度，把 ____的温度规定为100度．

已知x，y∈R，x+y＜2则x，y中至多有一个大于1，在用反证法证明时，假设应为____ 

①发现问题、提出问题     ②学会从不同角度思考问题，探索解决方案

③敢于向权威挑战             ④从自己的感受出发，为所欲为