搜题请搜索小程序“爱下问搜题”
问题 选择题

针对以农产品为主的居民生活必需品价格上涨较快的现象，国家要求各地要切实落实“米袋子”省长负责制、“菜篮子”市长负责制，稳定消费价格总水平，保障群众基本生活。从哲学上看，这体现了    [ ]

A．市场经济本身存在缺陷，需要国家的宏观调控

B．政府坚持一切从实际出发，实事求是

C．意识对物质具有决定作用，坚持意识就可稳定物价

D．政府坚持对人民负责原则

答案

答案：B

单项选择题

Housing construction materials give off distinctive sounds when exposed to high temperatures. Acoustic sensors accurately detect such sounds and fire alarms incorporating acoustic sensors can provide an early warning of house fires, allowing inhabitants to escape before being overcome by smoke. Since smoke inhalation is the most common cause of fatalities in house fires, mandating acoustic-sensor-based alarms instead of smoke detectors will eliminate house fire as a major cause of death.
Which of the following, if true, most weakens the argument given

A．The present high cost of acoustic-sensor-based alarm systems will decline if their use becomes widespread.

B．When fully ignited, many materials used in housing construction give off sounds that are audible even from several hundred yards away.

C．Many fires begin in cushions or in mattresses, producing large amounts of smoke without giving off any sounds.

D．Two or more acoustic-sensor-based alarms would be needed to provide adequate protection in some larger houses.

E．(E) Smoke detectors have been responsible for saving many lives since their use became widespread.
查看答案
问答题 简答题

测定材料的物相组成的方法各有什么特点？
查看答案