神经衰弱最常见的内脏功能障碍不包括( )。
A.消化系统障碍B.性功能障碍C.神经系统障碍D.呼吸功能障碍
参考答案:C
胃底腺的主细胞可分泌()
A.胃蛋白酶
B.胃蛋白酶原
C.黏液
D.盐酸
E.维生素B12
—Are they ______ books?
—No, they aren't. They're ______ books. [ ]
A. you; they
B. your; he
C. your; her
D. your; she