【名词&注释】
美国人(americans)、排他性(exclusiveness)、主要因素(main factors)、晶体渗透压(crystalloid osmotic pressure)、胶体渗透压(colloid osmotic pressure)、盐浓度(salt concentration)、巧夺天工、碳酸氢盐(bicarbonate)、千姿百态、努力学习(learn hard)
[单选题]室内压最低是在 ( )
A. 等容收缩期
B. 等容舒张期
C. 快速充盈期
D. 减慢射血期
E. 快速射血期
根据以下内容,回答下面的题目。Insure means to protect _51_ a loss of money.Most people can budget their money so that their income will cover expected expenses _52_ food, clothing, housing, and public services.But, there is no way to know _53_ who will suffer a crisis (危机) such as a serious illness, fire, flood, or a car accident.Such crises usually _54_ great expense.Even if people could predict crises, it would be hard to save enough money to _55_ the expenses.Insurance is a system _56_ a company collects money from many individuals and then pays certain expenses whenever one of those insured individuals is faced with a certain crisis.An insurance policy _57_ how much the insurance costs and how much the company will pay when a policy holder is faced with a certain crisis.There are many different kinds of insurance, _58_ hospital, motor-car and fire.Insurance can be rather expensive but most people buy insurance of some kinD.Insurance is something _59_ people buy and hope they will _60_ need._________