第22题: [单项选择]器质性二尖瓣狭窄不出现于() A. 第一心音亢进 B. Austin-Flint杂音 C. 舒张期隆隆样杂音 D. S2分裂 E. 开瓣音 参考答案:B
第23题:[单选题] ________ issues participation certificates, and ________ provides federal insurance for participation certificates. A. Freddie Mac; Freddie Mac B. Freddie Mac; Ginnie Mae C. Ginnie Mae; Freddie Mac D. Ginnie Mae; Ginnie Mae E. Freddie Mac; no one 参考答案:E