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运筹学研究和解决问题的基础是（），并强调系统整体优化功能。运筹学研究和解决问题的效果具有连续性

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doing回答下面的题目：Traffic in Uur CitiesTile volume of traffic in many cities in the world today continuesto expand．This causes many problems，including serious air pollution，lengthydelays，and the greater risk (51)accidents．Clearly，something must be done，but it is often difficult to persuade people to (52)theirhabits and leave their cars at home．One possible (53)is to make it more expensive for peopleto use their cars by (54)charges for parking and (55)tougherfines for anyone who (56)the law．In addition，drivers could be required to pay for using particular routes atdifferent times of the day．This system， (57)as“road pricin9”，is alreadybeing introduced in a (58)of cities，using aspecial electronic card (59)to the windscreen of the car．Another way of (60)with the problem is to provide cheapparking on the (61)of the city，and strictly control the number ofvehicles allowed into the centre．Drivers and their passengersthen use a special bus (62)for the final stage of their journey,Ofcourse．the most important (63)is to providegood public transport．However，toget people to (64)the comfort of their cars，publictransport must be felt to be reliable，convenient andcomfortable，with fares__ (65)at an acceptablelevel．

A. handling
B. solving
C. dealing

试述热力学第二定律的两种表述。

哲学层面上的天人合一主要表现在《（）》中。

用人单位应当为劳动创造符合国家职业卫生标准和卫生要求的工作环境和条件，并采取措施保障（）获得职业卫生保护。

A. 防护用品
B. 劳保用品
C. 防毒服装