去极化阻滞的特点包括()
A.有肌纤维成束收缩
B.强直刺激肌张力无衰减
C.无强直刺激后易化
D.为非去极化肌松药拮抗
E.可为抗胆碱酯酶药逆转
参考答案:A, B, C, D
The old lady had two clever sons, ____ did a good job in the 2010 National College Entrance Exam, though.
A.none of them
B.both of whom
C.none of whom
D.neither of whom
高效液相色谱法测定环境空气中醛酮类化合物时,醛和酮的2,4-二硝基苯腙标样应保存在()里。
A.冰箱
B.避光密闭的冰箱
C.铝箔专用袋