The Monday edition of USA Today said sixty people have died in 84 crashes since 2000. This is more than double the number of crashes during the previous five years. Its study found that more than 10 percent of the U. S. air ambulance helicopters (救护直升机) crashed during that time and about two-thirds of the fatal crashes occurred in poor visibility.
After reviewing hundreds of pages of documents and interviewing dozens of pilots, federal officials and executives with the companies that operate the flights, USA Today concluded that air ambulance companies have failed to apply safety requirements that might have saved lives. It also found that helicopters were used "excessively" for patients who weren’t severely injured.
But the newspaper also noted that there are studies which show that thousands of lives are saved each year by speedy flights to hospitals. It pointed out, as well, that pilots operate in challenging situations, such as having to land o
A. The pilots of ambulance helicopters should be blamed.
B. The air ambulance companies should be blamed.
C. Helicopters are not frequently used to save people’s lives
D. There are too many tasks for ambulance helicopters.
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A. X线钡剂灌肠检查 B. 直肠指诊 C. 纤维光束结肠镜检查 D. 乙状结肠镜检查 E. 常规体检及化验 [单选题]可进入肺泡的粉尘粒子,空气动力学直径均正7.07.μm以下视为呼吸性粉尘。
A.正确 B.错误 [单选题]国外发动机润滑油的分类法是（ ）。
A.API性能分类和SAE粘度分类 B.按汽油机油和柴油机油分类 C.按生产工艺分类 D.单级机油和多级机油 [单选题]制票后交付时，旅客当场发现票面身份信息有误时，售票员应（ ）。
A.办理退票 B.办理改签 C.自行负责 D.收回作废、另发新票 [判断题]确定闭式喷头的动作温度,一般要求喷头的公称动作温度比环境最高温度高30摄氏度。
A.正确 B.错误 [单项选择]钠石灰每吸收1克分子CO2产生热量为（）。
A. 12500卡 B. 13000卡 C. 13500卡 D. 14000卡 E. 14500卡 [判断题]线材允许代替开口销。 ( )
A.正确 B.错误 [单选题]U31网管上严重告警、主要告警、次要告警、警告分别对应的是什么颜色 （ ）
A.红色、橙色、黄色、蓝色 B.红色、黄色、橙色、蓝色 C.红色、蓝色、橙色、黄色 D.蓝色、橙色、黄色、红色 [单选题]平面控制网的坐标系统,应能满足测区投影长度变形值不大于______。( )
A.0.5cm/km B.1.5cm/km C.2.5cm/km D.3.5cm/km [多项选择]图形型标志的表现手法包括（）。
A. 综合型 B. 写意型 C. 具象型 D. 几何型 E. 字母型 F. 象形文字型 [单选题]远东公司2010年10月29日购入一条不需安装的生产线。原价为726万元，预计使用年限为5年，预计净残值为6万元，按年数总和法计提折旧。该固定资产2011年应计提的折旧额是（ ）万元。
A.240 B.232 C.192 D.234 我来回答: 提交
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