There is a high probability _________ you will find aspirin and penicillin in any medicine cupboard in the world.

A．that

B．which

C．what

D．where

乙炔衍生物、乙炔金属盐、1，2-环氧乙烷、偶氮氧化物等都属于易燃和易爆的化学试剂，处理时应该特别小心。