T波一般与动作电位的哪相对应()
A.0相
B.1相
C.2相
D.3相
E.4相
参考答案:D
The next direct steamer from Shanghai to your port sails at the beginning of next month.
为什么碱溶酸沉法提取黄酮类化合物时,要注意调节pH值?