事关企业新产品开发、技术改造、生产布局和人力资源开发等问题的决策，是（）决策。
参考答案：战略
________ the morning train, he would not have been late for the meeting.
A．Did he catch
B．should be catch
C．has he caught
D．Had he caught
既可作突触前抑制，又可作突触后抑制的递质是γ-氨基丁酸。()
