异氟烷心血管作用的特征是()
A.心律稳定
B.增加心脏对儿茶酚胺的敏感性
C.减慢心率
D.增加每搏量
E.减少心输出量
参考答案:A
态度的ABC模型中,C是指()成分。
A.行为
B.情感
C.认知
D.行为倾向
Jenny has lunch at school every day, _____? [ ]
A. didn't it
B. hasn't she
C. doesn't she
D. haven't he