题目

—What a mess! The guest will be here soon. —_________. I assure you the house will be spotless in a minute. A. Take your time      B. Take it easy          C. Never mind        D. Not at all 答案：B我国现行计划生育政策允许已对夫妇生育两个子女。从种群特征分析，该政策不会直接影响（ ）A.人口密度B.年龄组成C.性别比例D.出生率