成人的正常血压为收缩压低于()毫米汞柱,舒张压低于()毫米汞柱。()
A、140,90;
B、130,90;
C、140,100;
D、130,100;
参考答案:A
D.应由刘某承担,赵某承担补充责任
Intact buoyancy is a term used to describe().
A.the volume of all intact spaces above the waterline
B.an intact space below the surface of a flooded area
C.an intact space which can be flooded without causing a ship to sink
D.the space at which all the vertical upward forces of buoyancy are considered to be concentrated