胃腺壁细胞可
A．分泌胃蛋白酶原和凝乳酶原B．分泌碱性粘液，保护胃粘膜C．分泌盐酸和抗贫血因子D．分泌胃泌素E．分泌降钙素
参考答案：C
Little _____ that we were watching his every move, so he seemed to be going his own way in this business.[ ]
A. he realized
B. he didn't realize
C. didn't he realize
D. did he realize
抗A标准血清的效价要求在
A．1:64以上B．1:256以上C．1:16以上D．1:32以上E．1:128以上
