单选题 A thorough study of biology requires ______ with the properties of trees and plants, and the habit of birds and beasts.

【正确答案】 D
【答案解析】[解析] D项familiarity意为“熟悉，通晓”，符合题意。A项acquisition意为“获得，得到”；B项discrimination意为“区别，歧视”；C项curiosity意为“好奇”。