【名词&注释】
重要途径(important way)、历史知识(historical knowledge)、肺泡表面活性物质(pulmonary surfactant)、人民民主专政(people democratic dictatorship)、高度房室传导阻滞(advanced atrioventricular block)、肺泡表面张力(alveolar surface tension)、自然而然、将革命进行到底(carrying out the revolution)、人生在世、阵发性室性心动过速(paroxysmal ventricular tachycardia)
[单选题]His hands _______ a little as he took up a pen and began to write.
A. waved
B. shook
C. raised
D. 1ifted
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._________