以下哪项不属于演进性优生措施？（）
A.单性生殖
B.胚胎移植
C.建立并推行优生优育法规
D.提倡优选生育
E.人工授精
参考答案：C
Studies show that people are more _____ to suffer from back problems if they always sit before computer
screens for long hours. [ ]
A. likely
B. possible
C. probable
D. sure
伪顶
