有多烯结构，侧链上含有4个双键，目前仅有6个异构体()
A
暂无解析
Thenoiseofthepartystoppedmegetting________________sleep.
They________extensiveandpossiblydangerousactualflighttraining.
Themissingboyswerelastseen________neartheriver.
名词解释：preferredstock
Don’ttrusteverything________youhavereadinthenewspapers.
