(填米或者厘米) 桌子高80____。
—An interesting book. We're reading it these days.
如果m÷n=2(n不为0),那么m和n的公因数有2。(判断对错)
In the police station I saw the man from ________ room the thief had stolen the TV set.
如图所示,台秤上放置一个装有适量水的烧杯,已知烧杯和水的总质量为600g,杯的底面积为100cm2,将一个质量为600g、体积为300cm3的长方体实心物体A用细线吊着,然后将其一半浸入烧杯的水中(烧杯的厚度忽略不计,杯内水没有溢出,g=10N/kg).则: