对心力衰竭患者进行择期手术,至少待心衰控制以后()
A.<1周
B.1~2周
C.3~4周
D.5~6周
E.>6周
参考答案:C
对特定的招标项目有兴趣、愿意参加竞争,并按合法途径获取招标文件的法人,在性质上属于( )。
A.潜在投标人
B.投标人
C.中标人
D.招标人
The Coordinator Surface Search (CSS) in a SAR situation should display by night().
A.deck lights forward and aft
B.a white light over two red lights
C.a red light,white light,and blue light in a vertical line
D.a distinctive signal promulgated by the CSS