题干
With no rain for three months, and the food supplies running out, the present ________ here is getting worse.
A：case
B：conditio
C：state
D：situatio
答案(点此获取答案解析）
D
） 是青霉素类抗生素的母核，与有机物F缩合生成阿莫西林．某同学用对甲基苯酚为原料设计阿莫西林的合成路线如下： 
