题目

—Where does your father work, Lucy? —In England. But he _______ in France for 2 years. A. has worked      B. has been worked       C. worked         D. has been working   答案：C在安静状态下，甲的心率是50次/分，心输出量是5250mL；乙的心率是70次/分，心输出量是5250mL，关于甲乙两人的叙述正确的是（ ）A．甲的心脏工作潜力大B．乙的心脏工作潜力大C．甲乙心脏工作潜力一样大D．无法确定