题目

把一刚摘下的果树枝装在小瓶中,如图所示,用弹簧秤测得重为5牛,光照6小时后,测得重为4.8牛,其重减少的主要原因是    A.蒸腾作用     B.运输作用   C.呼吸作用       D.光合作用 答案：AMy neighbor, who works in ___ university , leads ____ happy life with his wife and two sonsA.a; aB.an; theC.the; aD.an; a