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Directions : Read the following text. Choose the best word or phrase for each numbered blank and mark A, B,C, or D on ANSWER SHEET1. The United States is a confederation of states. Each state has the (26) to make laws with re- gard to the state. (27) , based on public opinion, sates can (28) policies regarding education, and they may (29) a state income tax; they also determine the speed (30) , housing codes and the drinking age. In most parts of the United States, you (31) be 21 years old to buy alcohol in a liquor store, bar, (32) restaurant. In some states you may buy beer in a grocery store. If a store sells alcohol to a minor, the (33) 0f the store is usually (34) a large sum of money.(35) many areas have an open-container law, (36)means that people may not drink alco-hol on the street or in a car. Anyone (37) with an open container of alcohol may be arrested.(38) with all of these laws, the (39) 0f alcohol is a serious (40) in the United States and Canada. Drinking on college campuses, (41) there are many underage drinkers, has (42) greatly. In fact, alcohol sales have gone up (43) the legal drinking age was (44) from 18 to 21. Some people believe that if there were no legal drinking age, (45) in some other countries, North American youth would drink less. 26. [A] privilege [B] advantage [C] right [D] tradition
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【单选题】管道安装后,对管道进行严密性试验的试验压力为设计压力的()倍。
A.
2.50
B.
1.25
C.
1.10
D.
0.95
【单选题】各类耐压塑料管的强度试验压力为1.5倍(),严密性试验压力为1.15倍的()。
A.
工作压力 设计工作压力
B.
工作压力 工作压力
C.
设计工作压力 设计工作压力
D.
设计工作压力 工作压力
【单选题】管道安装后,对管道进行严密性试验的试验压力为设计压力的()倍。
A.
1.25;
B.
2.50;
C.
1.10;
D.
0.75。
【单选题】肺结核患者在接受抗结核治疗时,对疗效的考核首先要看
A.
痰菌阴转
B.
症状消失
C.
X线空洞闭合,炎性阴影消失
D.
血沉正常
E.
血清结核抗体阴性
【单选题】肺结核患者在接受抗结核治疗时,对疗效的考核首先考虑的指标是
A.
痰菌转阴
B.
症状消失
C.
血清结核抗体阴性
D.
红细胞沉降率正常
E.
X线空洞闭合,炎性阴影消失
【简答题】管道安装后,对管道进行严密性试验的试验压力为设计压力的()倍
【简答题】SDH 基本单元中的虚容器是用来支持 SDH ()连接的信息结构。
【多选题】下列选项关于燃气管道严密性试验表述正确的是( )。
A.
实验压力为设计输气压力的1.5倍
B.
严密性试验前应向管道内充气至实验压力,燃气管道的严密性试验持续实验一般不少于24h
C.
当设计输气压力p<5kPa时,实验压力为20kPa
D.
当p≥5kPa时,实验压力的1.15倍,但不得低于0.1MPa
E.
聚乙烯管(SDRⅡ)不得低于0.4MPa
【单选题】管道安装好以后,应对管系进行严密性水压试验或强度试验,一般严密性水压试验压力为设计压力的1.25倍,而强度试验压力()于严密性试验压力。
A.
相等
B.
较低
C.
较高
D.
或等于或低于
【单选题】管道的强度试验压力应为l.5倍的设计压力,严密性试验压力应为l.25倍设计压力,且不得低于( )MPa。
A.
0.6
B.
0.4
C.
0.5
D.
0.3
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