酒精温度计和煤油温度计所能测量的最高温度是不同的，这主要是由于酒精和煤油的( )。
A．沸点不同
B．凝固点不同
C．比热容不同
D．密度不同
参考答案：A
解析：温度计是利用液体受温度影响热胀冷缩的现象，在定容条件下，气体(或蒸汽)的压强因不同温度而变化的原理设计的。温度计所能测量的温度范围，是介于液体的凝固点与沸点之间的。由于酒精比煤油的沸点低，所以酒精温度计比煤油温度计所能测量的最高温度低；同样，由于酒精的凝固点比煤油的凝固点低，因此酒精温度计所能测量的最低温度比煤油温度计低。本题选A。
| 一、填入单词，完成下面一段话。一空一词。 | ||||||
| Welcome 1________ the Science Center (科技中心). We 3________ an exhibition hall (展厅) and a movies show room 2________ the first floor. The exhibition 4________ is on 5________ left and the show room is on the 6________. On the 7________ floor, we have five 8________: the computer training (培训) area, the games area, the space technology (航天科技) area, the library and the biology specimen (生物标本) area. 9________ the gate, you can see the library on your 10________. The biology area is on your right. The computer training area is behind the library. The space technology area is behind the biology area. The games area is 11________ the training area 12________ the space area. It's 13________ the middle. You can see lots 14________ interesting documentaries in the movies show room. You can also enjoy the new Hi-tech (高科技) in the exhibition room. You can 15________ books in the big library. You can learn a lot 16________ computer in the training area. You can play interesting new 17________ You can see a space shuttle (宇宙飞船) in the space area. If you like 18________, you can see lots of specimen. Just come and have a wonderful day here! | ||||||
| 二、请认真阅读上面的文字，依照它绘制出科技中心的平面图，并且标明每个区域的名字。 | ||||||
|
