分子式与苯丙氨酸()相同,且同时符合下列条件: ①有带两个取代基的苯环,②有一个硝基直接连接在苯环上的同分异构体的数目为 [ ]
A.3种
B.6种
C.8种
D.10种
答案:B
His first book _______ next month is based on a true story.
A.published
B.to be published
C.to publish
D.being published
断层两盘沿着断层面作相对水平运动,该断层称为()。
A.走滑断层
B.正断层
C.逆断层
D.斜滑断层