Dr. McKenzie has spent the past four years catching snowflakes, putting them under a microscope, and taking pictures. He is interested in snowflakes because they are so complicated that scientists do not comprehend them thoroughly. Why is Dr. McKenzie interested in snowflakes?
AStudying snowflakes is not time-consuming
BSnowflakes are beautiful and crystal clear
CScientists do not fully understand them正確答案
DDr. McKenzie would like to study something that can be examined under a microscope
答案與詳解
