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【单选题】
In November 1965, New York was blacked out by an electricity failure. The authorities promised that it would not happen again. Pessimists were certain that it would occur again within five years at the latest. In July 1977, there was a repeat performance which produced varying degrees of chaos throughout the city of eight million people. In 1965, the failure occurred in the cool autumn and at a time of comparative prosperity. In 1997, the disaster was much more serious because it came when unemployment was high and the city was suffering from one of its worst heat waves. In 1965, there was little crime or looting during the darkness, and fewer than a hundred people were arrested, in 1977, hundreds of stores were broken into and looted. Looters smashed shop windows and helped themselves to jewelry, clothes or television sets. Nearly 4, 000 people were arrested but far more disappeared into the darkness of the night. The number of policemen available was quite inadequate and they wisely refrained from using their guns against mobs which far outnumbered them and included armed men. Hospitals had to treat hundreds of people cut by glass from shop windows. Banks and most businesses remained closed the next day. The black-out started at 9:30 p. m. , when lightning hit and knocked out vital cables. Many stores were thus caught by surprise. The vast majority of New Yorkers, however, were not involved in looting. They helped strangers, distributed candles and batteries, and tried to survive in a nightmare world without traffic lights, refrigerators, elevators, water and electrical power. For twenty-four hours, New York realized how helpless it was without electricity. Look at the first paragraph, who were fight? The authorities or the pessimists?
A.
The authorities.
B.
The pessimists.
C.
Both.
D.
Neither.
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参考答案:
举一反三
【单选题】核酸分子中储存、传递遗传信息的关键部分是(    )
A.
磷酸排列顺序    
B.
戊糖排列顺序    
C.
碱基排列顺序    
D.
脱氧戊糖排列顺序
【单选题】为确诊最恰当的检查方法是
A.
B超声检查
B.
X线腹部拍片
C.
血常规检查
D.
腹腔镜检查
E.
腹腔穿刺抽液检查
【判断题】物联网是局域网,而互联网是广域网。
A.
正确
B.
错误
【简答题】__________是一种连接各类节点,从而形成____________结构的一种网络设备,适用于对通讯速率要求不高的局域网组网,工作于OSI模型中的物理层。_______是一种为任意两个网络节点提供独享带宽式电信号通路的网络互联设备,适用于高速局域网组网以及子网管理。____________是实现不同体系结构或协议的网络之间互通的网络互联设备,既适用于广域网互连,也可以用于局域网互连。
【单选题】对急性化脓性骨髓炎具有早期诊断意义的检查方法是
A.
X线检查
B.
CT检查
C.
血常规检查
D.
关节穿刺检查
E.
局部分层穿刺检查
【单选题】上消化道出血病因诊断的首选检查方法是
A.
内镜检查
B.
X线钡餐造影检查
C.
血常规检查
D.
放射性核素扫描
E.
吞钡试验
【单选题】下列函数中属于偶函数的是( )
A.
A
B.
B
C.
C
D.
D
【多选题】中国的“三网融合”将为物联网提供一个覆盖区域更广、涉及领域更多、渗透能力更强的“通道”、从而使其拥有强大的网络平台基础。请问,三网是哪三网?
A.
局域网
B.
电信网
C.
互联网
D.
电视网
【单选题】下列X线检查方法属于常规检查的是
A.
透视、摄片
B.
电子计算机体层扫描
C.
磁共振
D.
体层摄影
E.
造影检查
【单选题】已知在酸性条件下的标准电势值:E Ө (MnO 4 - /Mn 2+ )=1.51V , E Ө (O 2 /H 2 O)=1.23V , E Ө (PbSO 4 /Pb)= - 0.36V 。从电势值考虑,标准态时下列判断正确的是
A.
MnO 4 - 离子能将 H 2 O 氧化成 O 2
B.
O 2 能将 Mn 2+ 氧化成 MnO 4 - 离子
C.
Mn 2+ 能将 PbSO 4 还原成 Pb
D.
PbSO 4 能将 O 2 氧化成 H 2 O
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