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
