急性冠脉综合征包括（）。

A.ST抬高心肌梗死

B.非ST抬高心肌梗死

C.不稳定型心绞痛

D.以上都是

E.以上都不是

Which of the following statements best describes automatic stabilizers Although no legislative action has been taken, automatic stabilizers are programs that apply:（）

A. restraint during a recession and stimulus during an economic boom.

B. restraint during a recession but do not apply stimulus during an economic boom.

C. stimulus during a recession and restraint during an economic boom.