Xiaohong height138 cm; Mathematics textbooks are about 2 cents long;
The thickness of the diary is about 4 mm; The plane flies 800 kilometers per hour;
Xiaoling's home is away from school1750m; Xiaogang weighs about 35 kilograms;
So the answer is: tons, kilograms, centimeters, decimeters, millimeters, kilometers, meters, kilograms.