神经细胞处于静息状态时
A.仅有少量K+外流B.仅有少量Na+内流C.没有K+和Na+的净扩散D.有少量K+外流和Na+内流
参考答案:D
- Did Jack come back early last night?
- Yes. It was not yet eight o'clock ______ he got home. [ ]
A. before
B. when
C. that
D. until
下列化学用语书写正确的是
A.一氧化碳:Co
B.铜离子:Cu+2
C.氢氧化镁:Mg(OH)2
D.氧化铝:AlO