文档介绍：2001年北京中考物理试题(海淀区)
of rural drinking water sources, protection of drinking water sources in rural areas by the er sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
A．和平号空间站退役后坠入大气层与空气摩擦生热
B．冬天，用热水袋取暖，人体感到暖和
C．冬天手冷的时候，两手互相搓搓就暖和了
D．用锯锯木头，锯条发热
8．以下电器设备中属于利用电磁感应现象原理工作的是 ( )
A．电烙铁 B．发电机
C．电动机 D．电磁起重机
9．如图1所示，两手指用力捏住铅笔，使它保持静止。以下说法中正确的选项是 ( )
图1
A．两手指受到的压力相同，左边手指受到的压强较大
B．两手指受到的压强相同，左边手指受到的压力较大
C．两手指受到的压力相同，右边手指受到的压强较大
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
D．两手指受到的压强相同，右边手指受到的压力较大
10．如图2所示，电源两极间电压保持不变，滑动变阻器的滑片p向a端移动过程中，以下判断正确的选项是 ( )
图2
A．电流表、电压表示数都变大
B．电流表、电压表示数都变小
C．电流表示数变小，电压表示数变大
D．电流表示数变大，电压表示数变小
二、多项选择题：以下各小题的四个选项中，符合题意的选项均多于一个，请将正确选项前的代号填入题后括号内(每题3分。共6分。错选、多项选择，该小题不得分，选对但不全的只得1分)
11．在日常生活中的水平桌面上滑行的木块，水平方向只受两个力作用，这两个力的三要素都相同(木块可视为一个点)，以下表达正确的选项是 ( )
o