限制被测要素的实际位置对理想位置变动量的指标称为（）
A.定位度
B.位置度
C.方位度
参考答案：B
W: You look like you are freezing to death. Why don’t you put this on M: Thank you, it was so warm at noon, I didn’t expect the weather to change so quickly. Question: What do we learn from the conversation().
A. The woman didn’t expect it to be so warm at noon.
B. The woman is sensitive to weather changes.
C. The weather forecast was unreliable.
D. The weather turned cold all of a sudden.
A．水的温度降低到0℃就会结冰
B．同一种晶体的熔点和凝固点不同
C．高压锅内的气压大、水的沸点高，所以食物熟得更快
D．扩散现象说明一切物体的分子都在不停地做无规则的运动
