根据以下内容回答下列各题,Insure means to protect _51_ a loss of money. Most people can bud

根据以下内容，回答下列各题。

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 kin

D．Insurance is something _59_ people buy and hope they will _60_ need．

51._________

A.for

B.from

C.against

D.with

A.根

B.根及根茎

C.草质茎

D.全草

E.地上部分 细辛

请根据以下内容回答下列各题The passage mainly discusses __________.

A.award-winning works of literature

B.an organization that awards artists

C.the special donation of an artist

D.the individual patrons of artists

根据以下内容，回答下列各题：

A．动作电位

B．阈电位

C．局部电位

D．静息电位

E．后电位

终板电位是（）。

A.频数

B.变量

C.变量值

D.分组标志

根据以下内容，回答下列各题：

A．麻风病

B．霍乱

C．人感染高致病性禽流感

D．艾滋病

E．天花

甲类传染病（）。