疾病轮状模型的外环是指A．环境 B．遗传因子 C．宿主 D．特异病原体 E．病原微生

按时间顺序排列下列历史事件，正确的是

①日本偷袭珍珠港②德国突袭波兰③美英盟军诺曼底登陆④苏军攻克柏林[ ]

A．①②③④

B．②①④③

C．①②④③

D．②①③④

据国家发改委、国家统计局调查显示，2010年11月，全国70个大中城市房屋销售价格同比上涨7．5％。小张害怕房价再上涨，马上购买了现房，价格为60万，首付30万，在15年内付清银行贷款30万及利息6万。其中的60万房价、30万首付现金及6万利息分别体现了货币的[ ]

A．流通手段、价值尺度、支付手段职能

B．价值尺度、流通手段、支付手段职能

C．价值尺度、支付手段、流通手段职能

D．支付手段、流通手段、储藏手段职能

企业生产计划的含义？

People today all over the world are beginning to hear and learn more and more about the problem of pollution. (46) Pollution is caused by either the release by man of completely new and often artificial substances into the environment, or by releasing greatly increased amounts of a natural substance, such as oil from oil tankers into the sea.
(47)The whole industrial process which makes many of the goods and machines we need and use in our daily lives, is bound to create a number of waste products which upset the environmental balance, or the ecological balance as it is also known. (48) Many of these waste products can be prevented or disposed of sensibly, but clearly while more and more new goods are produced and made complex, there will be new, dangerous wastes to be disposed of, for example, the waste products from nuclear power stations.
(49)Whatever its underlying reasons, there is no doubt that much of the pollution caused could be controlled if only companies, individuals and governments would make more efforts. In the home there is an obvious need to control litter and waste. Food comes wrapped up three or four times in packages that all have to be disposed of; drinks are increasingly sold in bottles or tins which cannot be reused. This not only causes a litter problem, but also is a great waste of resources, in terms of glass, metals and paper. Advertising helped this process by persuading many of us not only to buy things we neither want nor need, but also to throw away much of what we do buy. (50)Pollution and waste combine to be a problem every one can help to solve by cutting out unnecessary buying, excess consumption and careless disposal of the products we use in our daily lives.

小张承诺：如果天不下雨，我一定去听音乐会。 以下哪项为真，说明小张没有兑现承诺 Ⅰ．天没下雨，小张没去听音乐会。 Ⅱ．天下雨，小张去听了音乐会。 Ⅲ．天下雨，小张没去听音乐会。

A．仅Ⅰ

B．仅Ⅱ

C．仅Ⅲ

D．Ⅰ、Ⅱ和Ⅲ