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【简答题】
阅读以下文章,选择最佳答案填空。 Since the terrorist attacks on the United States in September, Americans have given millions of dollars to help thousands of victims and their families. A lot of that money was given to the American Red Cross. The American Red Cross collected more than five-hundred-million dollars for this purpose in 1______ it called the Liberty Fund. Recently, Red Cross officials admitted that they 2______ the families all the money that was collected. They said the Liberty Fund was created to help the victims of the September attacks, and also to help victims of future attacks. The officials said they regretted that the American public did not understand this. Last week, Red Cross officials announced a major change in policy. They said all the money 3______ to the Liberty Fund would be used only to help the victims of the September Eleventh attacks and their families. The money will help families 4______ costs of daily living such as housing and food for up to one year. Immediately after the terrorist attacks, the Red Cross 5______ money for three months of living costs to more than two-thousand families of people who were killed. Red Cross officials say the organization also provided support to about twenty-three-thousand other families who were affected by the terrorist attacks. These included rescue workers and people who could not go back to their homes near the World Trade Center in New York City. Business people who lost their workplaces also 6______ help. However, the Red Cross planned to use about half the money given to the Liberty Fund for future programs. It wanted the money to increase blood supplies, improve communications and expand services for families of people 7______ in the military forces. Individuals who had given money to the Liberty Fund reacted strongly to this news. They expected their money to be used immediately to help victims of the attacks. Red Cross officials now say the Liberty Fund will be repaid for any money already 8______ for other projects. The American Red Cross has been active for more than one hundred years. Its policy has been to 9______ some of the money given after a tragedy to prepare for future emergencies Officials say the organization's appeals are supposed to tell people that the money will be used to help victims of the current emergency or similar ones. They have promised to investigate to see if the message is clear enough to the people who give their money. Red Cross officials say any relief organization needs to build up an amount of money to help victims of smaller emergencies. The American Red Cross says it 10______ aid services in about sixty-thousand emergency situations each year such as fires, floods, storms and accidents. 1.A、Which B、What C、/ D、that 2.A、should not give B、would not give C、did not give D、were not giving 3.A、that gave B、given C、was given D、gave 4.A、pay B、pay with C、pay at D、pay for 5.A、provided B、produced C、promised D、prepared 6.A、recieved B、accepted C、collected D、gathered 7.A、fighting B、working C、serving D、engaging 8.A、given B、carmarked C、delivered D、used 9.A、keep B、save C、put D、store 10.A、prepared B、provides C、gets D、given
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【简答题】模拟信号是一种连续变化的电信号,而数字信号是一种离散的 。
【简答题】模拟信号是一种连续变化的____电信号____,而数字信号是一种离散的脉冲序列____。
【单选题】是一种连续信号,代表消息的信号参量随消息变化而连续变化。
A.
模拟信号
B.
数字信号
C.
光电信号
D.
数据信号
【单选题】当角量子数l=2的时候,电子运动的光谱符号是()。
A.
s
B.
p
C.
d
D.
f
【多选题】阅读程序流程图,计算出 变量x,y,z的最终值,下列选项正确的是:
A.
x = 5,y =13
B.
x = 13 , y = 3
C.
y = 13, z = 7
D.
y = 13, z = 6
【单选题】当角量子数l=2的时候,电子运动的光谱符号是()。
A.
s
B.
d
C.
p
D.
f
【多选题】( )在车站的出入口处、便于乘客进站购票、验票、自动充值等需求。
A.
自动售票机
B.
自动验票机
C.
自动充值机
D.
人工售票机
【判断题】数字信号是一种离散式的电信号,而模拟信号是一种连续变化的电信号。【 】
A.
正确
B.
错误
【单选题】新型给水管材改聚丙烯管,它的代号为哪项?
A.
PE
B.
PB
C.
PP-R
D.
UPVC
【单选题】空气流过轴流式压气机的整流器时,气流的:
A.
速度增加,压力下降
B.
速度增加,压力增加
C.
速度下降,压力增加
D.
速度下降,压力下降
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