在视网膜中,能产生动作电位的细胞是
A.色素细胞B.视杆细胞和视锥细胞C.双极细胞D.水平细胞E.神经节细胞
参考答案:E
All the scientific evidence ________ that increasing use of chemicals in farming ________ damaging
our health. [ ]
A . show; are
B. shows; are
C. show; is
D. shows; is