centimeter
Width is a length or distance. The unit of length is the meter.
It depends on the width of the desk. You could use centimeters or meters.
millimetres (or tenths of millimetres, if you have a micrometer)
None! I would measure in centimeters if I were you!
measuring temperature the metric system of °C is used.
The SI (metric) unit for mass is the kilogram.
monkey
joules
meter
the meter
gram
kilometres