一只船在水中航行时所受阻力与其速度成正比．现此船由静止开始沿直线航行，若保持牵引

根据国家相关规定，结合公路工程的特点，下列关于公路工程施工总承包企业资质的划分，正确的是()

A.特级企业、一级企业、二级企业

B.特级企业、一级企业、二级企业、三级企业

C.一级企业、二级企业

D.一级企业、二级企业、三级企业

高渗性缺水时下列哪种情况不会出现

A．口渴

B．血清钠大于150mol／L

C．尿比重升高

D．恶心、呕吐

E．红细胞压积大于48％

Man: I'm sorry I missed the football game, but I had a terrible cold. Woman: You didn't miss anything. We couldn't have played worse. Question: What does the woman mean

A．She's never watched a better game.

B．Football is her favorite pastime.

C．The game has been canceled.

D．Their team played very badly.

影响物理能作用人体深度的主要因素有（）

A.物理能性质

B.环境温度

C.环境湿度

D.人体组织特点

E.患者性别年龄

BGP使用UDP协议传输报文。