What is the volume of this box?

How tall is this building?

The progress of this project is more than expected.

Please double the amount of this recipe.

Sodium cyanide is widely used in the extraction of metals and the manufacture of electronic components.

In this experiment, we will use sodium hydroxide.

Sodium chloride is the main component of table salt, and its chemical formula is NaCl.

Please sit in this seat.

Please wait until your turn.

Overdose may have a negative impact on health.