当出现油泵出口压力低报警，同时备用泵自启动时怎么办？

Happy April Fool’s Day．In celebration of the day, we have put together a list of some of the greatest hoaxes in history．They are the lies that have been designed for innocent people who are ready to believe them．

INSTANT COLOUR TV

In 1962 there was only one TV channel in Sweden, and it broadcast in black and white．The station’s technical expert, Kjell Stensson, appeared on the news to announce that thanks to a newly developed technology, all viewers could now quickly and easily transform their existing sets to display colour reception．All they had to do was pull a nylon stocking over their TV screen, and they would begin to see their favorite shows in color．Reportedly, hundreds of thousands of people were taken in．Actual color TV transmission only started to appear in Sweden on April 1, 1970．

SAN ERRIFFE

In 1977 the British newspaper The Guardian published a special seven-page supplement （增刊）in honor of the tenth anniversary of San Serriffe, a small republic located in the Indian Ocean．A series of articles affectionately described the geography and culture of this unknown nation．The Guardian’s phones rang all day as readers asked for more information about the beautiful holiday spot．Few noticed that everything about the island was made up．

NIXON FOR PRESIDENT

In 1992 American National Public Radio’s Talk of the Nation program announced that Richard Nixon, in a surprise move, was running for President again．His new campaign slogan was, “I didn’t do anything wrong, and I won’t do it again.” Accompanying this announcement were audio clips of Nixon delivering his election speech．Listeners responded immediately to the announcement, flooding the show with calls expressing shock and anger．Only during the second half of the show did the host John Hockenberry reveal that the announcement was a practical joke, Nixon’s voice was copied by comedian Rich Little．

小题1:The underlined phrase “taken in” in the 2nd paragraph means ________.

A．deceived

B．pleased

C．innocent

D．broadcast小题2:What can be inferred from the text about Color TV?

A．The Swedish People didn’t watch color TVs until 1970．

B．The Swedish People began to watch color TVs in 1962．

C．Kjell Stensson was a TV host．

D．Not many people believed Kjell Stensson．小题3:Which of the following statements about San Serriffe is True?

A．San Seffiffe is located in the Indian Ocean．

B．San Seffiffe became a republic in 1967．

C．San Seffiffe is a beautiful place．

D．San Seffiffe doesn’t exist．小题4:We get to know from the passage that _____．

A．Richard Nixon didn’t win the election in 1992．

B．Richard Nixon didn’t do anything wrong

C．Richard Nixon was not liked by the American people

D．Richard Nixon asked Rich Little to speak for him

把一定质量的KCl不饱和溶液变成饱和溶液，下列说法中不正确的是（　　）

A．溶液的质量只可能变大或不变

B．溶液的质量可能变大，也可能变小或不变

C．溶质的质量分数可能变大，也可能变小或不变

D．溶质的质量分数只可能变大或不变

集中操作管理装置主要用于（）。

A.了解生产过程的运行状况

B.模/数的相互转换

C.输入/输出数据处理

D.控制算法的运算

执行下列指令后：
MOV AX， 1234H
MOV CL， 4
ROL AX， CL
DEC AX
MOV CX， 4
MUL CX
HLT
寄存器AH的值是( )。

A．92H

B．8CH

C．8DH

D．00H

作为肿瘤定性诊断的是

A．CT
B．B超
C．MRI
D．X线造影
E．细胞学检查