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【单选题】
Directions: The following passage is about railway in the US and it is followed by some statements. Read the passage, and decide whether the statements are true or false. Railway in the United States If you're tired of flying or if you are reluctant to drive for days on unfamiliar roads, a train trip may be a good choice. Train travel makes transportation an enjoyable and valuable part of your journey as opposed to a necessary displeasure: you can see miles of countryside as you gently speed towards your destination. Long-distance travel by train is not as common in the United States as in many other parts of the world. Most rain travel is in the northeast part of the country, linking Boston, New York, Philadelphia, Baltimore and Washington D.C. Special express trains travel between New York and Washington D.C. All seats on these trains are reserved in both coach (2nd class) and Club car (1st class). Long-distance trains also serve major cities such as Atlanta, Miami, New Orleans, Chicago, Los Angeles, San Francisco and Seattle. Sleeping compartments are available on most long-distance trains and must be reserved in advance. Most trains are operated by AMTRAK, the national railroad corporation. The number for buying ticket is 800-USA_RAIL. Amtrak currently offers three variations on its U.S.A. Rail Pass, which is good for travel across the United States. The U.S.A. Rail Pass is not valid on select trains. The pass is available to both U.S. and international citizens. Amtrak also offers a California Rail Pass, which is good for seven days of economy-class travel in California over a 21-day period. You can get a sleeper car and make the train your roving hotel as you take a cross-country jaunt through some of the most beautiful, rugged landscapes in the world. Amtrak offers a number of scenic routes that will help you to slow down and get a good look at the world outside your window. Decide whether the following statements are true or false. 1. Long-distance travel by train is common in the United States.
A.
True.
B.
False.
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参考答案:
举一反三
【单选题】边缘封闭区是
A.
包括上下颌牙槽嵴顶的区域,能承担咀嚼压力,抵抗义齿基托的碰撞
B.
上下颌牙槽嵴的唇侧和舌腭侧区域,不能承受较大的压力
C.
义齿边缘接触的软组织部分
D.
无牙颌的上颌隆突、颧突等部位,不能承受咀嚼压力
E.
为了增加上颌义齿后缘的封闭作用,对组织稍加施压,以便制作后堤的区域
【判断题】公共征信机构起源于美国
A.
正确
B.
错误
【单选题】指义齿边缘接触的软组织部分
A.
主承托区
B.
副承托区
C.
边缘封闭区
D.
缓冲区
E.
翼缘区
【单选题】一个顺序栈中已经含有3个元素,如图示,元素a4正等待入栈。以下序列中不可能出现的出栈序列是( )。
A.
a3,a1,a4,a2
B.
a3,a2,a4,a1
C.
a3,a4,a2,a1
D.
a4,a3,a2,a1
【单选题】在主机遥控系统中,常会出现调速回路在静态时主机油门开度会在一个较小的范围内波动的现象,其原因是( ),解决办法是( )。
A.
调速系统反应太迟钝/可增添微分调节规律
B.
调速系统反应太灵敏/可增添一较小的死区
C.
主机往复运动产生转速波动/可调大积分作用
D.
主机往复运动产生转速波动/可调小积分作用
【多选题】义齿边缘接触的软组织部分包括( )。
A.
黏膜皱襞
B.
系带附着
C.
后堤区
D.
磨牙后垫
E.
上颌结节
【简答题】边缘封闭区是义齿边缘接触的软组织部分,如
【单选题】义齿边缘接触的软组织部分
A.
主承托区
B.
副承托区
C.
边缘封闭区
D.
缓冲区
【单选题】下列不属于义齿戴入后引起软组织疼痛的可能原因的是
A.
系带部位基托缓冲不够
B.
正中咬合时有早接触
C.
基托边缘过长过锐
D.
牙槽嵴上有骨尖、骨突部位
E.
卡环过紧
【单选题】设有一顺序栈已经含有3个元素,如图3-1所示,元素a4正等待入栈。以下序列中不可能出现的出栈序列是( )。
A.
a4,a3,a2,a1
B.
a3,a2,a4,a1
C.
a3,a1,a4,a2
D.
a3,a4,a2,a1
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