麻黄素滴鼻剂属于（）
A.血管收缩剂
B.鼻黏膜润滑剂
C.抗过敏滴鼻剂
D.抗菌素类滴鼻剂
E.止痛剂
参考答案：A
— I am worried I can't get into a good high school because I'm weak ______ English.
— Don't worry. ______ and asking a teacher for help can help a lot. [ ]
A. in; Work hard
B. in; Working hard
C. at; Working hard
D. at; To work hard
鱼类无真正的肠腺，进行肠内消化的主要消化腺是（）和（），鲤科鱼类的肝脏因混杂有胰细胞而称（）
