张先生，50岁，肥胖（BMI=28.6kg/m²），未见其它异常；血脂检查结果：TC240mg/dl（6.22mmol/L），LDL-C130mg/dl（3.37mmol/L），HDL-C35mg/dl（0.91mmol/L）；张先生10年内发生心血管病的危险程度（危险分层）是（）.

A.极高危

B.高危

C.中危

D.低危

E.不确定

To launch a liferaft by hand you should（）.

A.cut the casing bands，throw the liferaft over the side，and it will then inflate

B.detach the operating cord，throw the raft over the side，and it will then inflate

C.cut the casing bands，throw the raft over the side，and pull the operating cord

D.throw the liferaft over the side and pull the operating cord