在指定固定循环之前，必须用辅助功能（）或（）使主轴
参考答案：M03或M04；旋转
Everyone in the village is very friendly. It doesn't matter ________ you have lived there for a short or
a long time. [ ]
A. why
B. how
C. whether
D. when
图甲是“观察水沸腾”的实验装置图
（1）安装该实验装置时，应该先固定A、B两铁圈中的______铁圈．
（2）水沸腾时温度计示数如图乙所示，由此可知，水的沸点是______℃．
