可产生抑制性突触后电位的离子基础是()。
A.K+
B.Na+
C.Ca2+
D.Cl-
E.H+
参考答案:D
—I could have arrived much earlier, but I ____ in the traffic.
—What a pity![ ]
A. would be caught
B. was caught
C. has been caught
D. had been caught
我国财政部发行2013年记账式附息(三期)国债300亿元,期限7年,票面年利率为3.42%。发行国债带来一系列影响,其路径是()
①增加国内需求
②扩大政府投资
③增加财政收入
④刺激经济发展
A.②-③-①-④
B.①-④-③-②
C.③-②-①-④
D.④-①-②-③