题目

   Did you know that women’s brains are smaller than men’s? The average women’s brain weighs 10% less than men’s. Since research has shown that the bigger the brain, the cleverer the animal, men must be more intelligent(聪明的) than women. Right? Wrong. Men and women always score similarly on intelligence tests, despite the difference in brain size. Why? After years of study, researchers have concluded that it’s what’s inside those matters, not just the size of the brain. The brain consists of “grey matter” and it has been suggested that smaller brain appears to work faste（1）如图所示的刻度尺测量物体的长度则所测物体的长度为2.552.55厘米．（2）在测金属块的密度的实验中：a、调节托盘天平．将天平放在水平桌面上，把游码放在标尺的零刻度线处，发现指针的位置在分度盘的右侧，要使横梁平衡，应把平衡螺母向左左调节．b、用调节好的天平称金属块的质量．把金属块放在天平的左盘内，当右盘内有50g的砝码一个，游码在标尺上的位置如图1所示时，天平平衡，则金属块的质量为5454g．C、将金属块放入盛有35cm3水的量筒中以后，水面所到达的位置如图2所示，则金属块的体积为2020 cm3，金属块的密度是2.72.7 g/cm3=27002700kg/m3．