【单选题】My name is Jack Kent Brown. So my surname is _______。
【单选题】This is my friend,Jack Brown. His __________ name is Brown.
【单选题】Jack is a boy, ______ last name is Brown.
【单选题】---Why is Mr Brown mad at Jim? —Because Jim’s exam results are 。
【单选题】Jack Brown is a boy. Jack is his _____________
【单选题】下列分子中,哪些通常不是药物毒性作用的靶分子()。