船检机构的验船师在执行法定检验时有何权力？
参考答案：
1）、对船舶提出修理要求。
2）、在受到港口有关当局要求时，上船检查和检验。
A client with bicuspid aortic valve has severe stenosis and is scheduled for valve replacement. While teaching the client about his condition and upcoming surgery, the nurse shows him a heart illustration. Which valve will be replaced ？（）
A．A
B．B
C．C
D．D
东巴文是目前世界上唯一保留完整的象形文字，被称作“活着的象形文字”。( )
