【单选题】What is the focus of this passage?
【单选题】How can sharks find their quarries?
A.
By good sense of taste.
B.
By good sense of smell.
D.
By good sense of hearing.
【简答题】[A] commitment [B] sense [C] communication [D] connection
【简答题】下列缓控释制剂的制备方法利用的释药原理是