题目

________ for the doctor's careful treatment, he ________ till last year. A .Had it not been, couldn't have lived B . Were it not, couldn't live C .If it were not, can't live D . If they were not, couldn't live 答案：A（10分）下图是人体内某内分泌细胞，请根据图完成下面的问题。（1）图中7是______________类物质，是在细胞内［ ］___________________上合成的。（2）若用3H标记该细胞所吸收的氨基酸，则3H在该图结构中先后出现的顺序是（用数字表示）___________________。（3）7在合成、运输过程中需消耗大量能量，是由［ ］_____________提供的。（4）通过图示可以得出细胞中哪些膜结构可以相互转换____________________________________________________________________。（5）高尔基体膜、内质网膜、_______________、_____________等细胞器膜和______________、______________构成生物膜系统。