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While drunken driving may be on the decline, traffic safety experts remain puzzled over how to deal with another alcoholrelated danger: drunken pedestrains. Pedestrians struck and killed by cars often are extremely drunk. In fact, they are intoxicated more frequently-and with higher bloodalcohol levels-than drunken drivers who are killed in accidents, various studies have shown. Forty percent of adult pedestrians involved in fatal crashes have a bloodalcohol level of at least 0.10-which by law in most states signifies intoxication-compared to only 25 percent of drivers in deadly accidents, according to recent federal data. Some types of pedestrain accidents have been declining nationally, especially those involving children, but the number of adult pedestrians who are drunk when killed in traffic has remained relatively steady at 2500 a year. The total number of pedestrians killed annually in U.S. traffic accidents is at least 7000, or one of every seven highway accidents resulting in death. “We’re dealing here, we think, with a very severe drinking problem that leads to a severe highway safety problem,” said Richard Blomberg, president of Dunlap and Associates Inc, in Norwalk, Coon. Blomberg, whose consulting company found a very high rate of alcohol involvement in a controlled study of pedestrian accidents in New Orleans, was among several researchers who spoke on the topic at the annual meeting of the Research council’s Transportation Research Board(TRB)  in Washington in January. Pedestrian accidents have not received enough attention in the past, according to Kay Colpitts, who chairs the board’s committee on pedestrians. Few methods exist to monitor walking habits, she said, and researchers have been mystified about how to prevent disasters. 5.Which of the following would be the best title for the passage? A.Traffic Safety.                   B.Drunken Drivers. C.Drunken Pedestrian Accidents.     D.A Severe Highway Safety problem. 6.Among the causes of walkers’ accidents, the most serious problem is . A.long delays in traffic signals that may make people cross streets without paying attention to traffic rules B.alcohol C.a lack of adult keeping eyes on many children involved in accidents D.former drunken drivers whose licenses are not allowed to use for a time 7.According to recent federal data, drunken drivers with an over 0.10 bloodalcohol level in deadly accidents . A.are 15 percent less than drunken adult walkers with the same level B.are 2500 a year C.are at least 7000 in US traffic accidents D.make up oneseventh of highway accidents 8.According to the passage, what is Blomberg? A.A researcher.                        B.A specialist in traffic safety. C.A clerk of a consulting company.        D.A government official
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【判断题】研究表明,父母离异或者单亲家庭是青少年自杀的风险因素之一。()
A.
正确
B.
错误
【单选题】在螺栓连接中,采用弹簧垫圈防松的是
A.
摩擦防松
B.
机械防松
C.
冲边防松
D.
粘结防松
【单选题】下列关于位图与矢量图的叙述,正确的是( )(2017)
A.
相对于位图而言,矢量图占用的存储空间较大
B.
位图放大后不会变模糊,矢量图放大后会变模糊
C.
矢量图和位图不能相互交换
D.
图像的分辨率是位图的一个重要指标,而矢量图与分辨率无关
【多选题】下列关于过梁的说法,错误的有( )。
A.
过梁可以兼做附加圈梁
B.
构造梁起到抗裂、抗震、稳定等构造性作用,过梁属于构造梁,不需要通过计算确定高度
C.
过梁俩端支承在墙上的长度不小于240mm
D.
钢筋砖过梁不应超过2m,砂浆强度等级不宜低于M7.5
E.
为使墙体受力均匀,钢筋混凝土过梁截面应为矩形
【单选题】下列关于位图与矢量图的叙述,正确的是( )
A.
相对于位图而言,矢量图占用的存储空间较大
B.
位图放大后不会变模糊,矢量图放大后会变模糊
C.
矢量图和位图不能相互交换
D.
图像的分辨率是位图的一个重要指标,而矢量图与分辨率无关
【单选题】下列关于位图和矢量图的叙述,不正确的是?
A.
位图常用的文件格式有GIF   JPG
B.
矢量图被放大或缩小时不会变形失真
C.
位图被放大或缩小时会变形失真
D.
Photoshop是一款矢量图编辑软件
【判断题】平行投影面的直线一定是投影面的平行线;垂直投影面的平面一定是投影面的垂直面
A.
正确
B.
错误
【单选题】下列关于位图和矢量图的叙述,不正确的是( )。
A.
位图常用的文件格式有gif、jpg
B.
矢量图被放大或缩小时不会变形失真
C.
位图被放大或缩小时会变形失真
D.
PhotoShop是一款矢量图编辑软件
【判断题】平行投影面的直线一定是投影面的平行线
A.
正确
B.
错误
【判断题】研究表明,父母离异或者单亲家庭是青少年自杀的风险因素之一。
A.
正确
B.
错误
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