衡量组织兴奋性的指标是()
A.动作电位
B.阈电位
C.肌肉收缩或腺体分泌
D.阈强度
E.静息电位
参考答案:D
—Could you give me a hand to carry the heavy box?
—_______[ ]
A. My favorite
B. With pleasure
C. You are right
D. Don't worry
水痘的皮疹有何特点?