题型:排序题 读一读,排一排。( ) First, you should read the email.( ) OK. And click on"Send".( ) Then you should click on"Reply".( ) Now you can write your message.( ) Yes, you are right. You are very clever. 查看答案
题型:单项选择题 静息电位产生的原因是()A.细胞膜对Na+通透性增加,Na+内流B.细胞膜对Na+通透性增加,Na+外流C.细胞膜主要对K+有通透性,K+内流D.细胞膜主要对K+有通透性,K+外流 查看答案