题干
—Have you ever corrected these compositions ?
—Of course．They are based on true stories．Most of them are from personal _______．
—Of course．They are based on true stories．Most of them are from personal _______．
A：experience
B：experience
C：experienced
D：experiencing
答案(点此获取答案解析）
A
同强度的光照，其他条件一致。照光相同时间后，测得各装置内氧气的增加量如下图所示。下列叙述错误的是