That is one of those books that _____ worth reading. [ ]
A. is
B. have
C. has
D. are
答案:D
决定淡水生态系统初级生产量的限制因素()
A.营养物质
B.光
C.水中氧气的浓度
D.食草动物的捕食
E.水浓度
阿托品、乙醇等中毒()
A.昏迷
B.谵妄
C.惊厥
D.肌纤维颤动
E.瘫痪