試題詳解

37 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?
(A) Studying snowflakes is not time-consuming.
(B) Snowflakes are beautiful and crystal clear.
(C) Scientists do not fully understand them.
(D) Dr. McKenzie would like to study something that can be examined under a microscope.