国际航运从总体上看,属于寡头垄断或垄断竞争市场。()
参考答案:对
I don't ______ rock 'n' roll. It's much too noisy for my taste. [ ]
A. go after
B. go away with
C. go into
D. go in for
收缩中、晚期喀喇音的听诊特点为
A.音调低、强度弱、在S2之后,与S1和S2的间距相仿,心率较快B.在S2后约0.1秒出现,中频、较响而短促,在心尖部和胸骨下段左缘最易闻及C.音调高、短促、响亮、清脆,在S2 0.07秒出现D.高频爆裂样、高调、短促、清脆,紧接于S1之后约0.05~0.07秒E.高调、短促、清脆,如关门落锁的Ka-Ta样声音