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【简答题】
How to approach Reading Test Part Six &8226;This part of the Reading Test tests your ability to identify additional or unnecessary words in a text. &8226;Most lines contain one extra word that makes the sentence incorrect. &8226;Read the whole text quickly to find out what it is about. As you read, try to identify the words that are incorrect. &8226;Then read the text again, and write down the extra words. Remember there will be only one extra word in a line, and some lines are correct. ? Read the advertisement below about a company which lets offices. ? In most lines there is one unnecessary word. It is either grammatically incorrect or does not fit in with the sense of the text. Some lines are correct. ? For each numbered line 41 - 52, find the unnecessary word and then write the word in CAPITAL LETTERS on your Answer Sheet. If a line is correct write CORRECT on your Answer Sheet. Prestigious but inexpensive offices In some towns business premises are at a premium, with scarce office space rapidly being used up. So what do you do best if you need a base for a start-up company but 41. either cannot find a suitable location or cannot afford the overheads? One solution for 42. which ever more new businesses are opting is to use the services of an office provider, 43. a company applied with business premises, generally in prestigious locations. Its 44. subscribers can both save money by working from home, while impressing their own 45. customers by using the premises such as their business address, Offices can also be 46. hired for as short a time as an hour, or for any other period, making it possible for 47. subscribers to hold meetings in rather more professional-looking surroundings than 48. their own home. In addition, office providers offer secretarial and the reception 49. facilities, thus are making these services available without the normal delays and costs 50. arising from having to recruit and employ staff. The flexibility of monitoring the 51. system means that your changing requirements can be accommodated without some 52. difficulty, allowing you to concentrate yourself on growing your business. Just choose the services you require. (41)
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【单选题】已知信号【图片】对其抽样时能恢复原信号最大的抽样周期为
A.
1/4
B.
4
C.
1/(4PI)
D.
4PI
【简答题】如图4.3.3所示,已知输入时钟频率为20MHz(周期为50ns),希望得到一个输出信号PF,该信号为周期性输出信号,重复周期为150ns,其中高电平时间为50ns。请用D触发器和基本门电路实现。
【单选题】下列各项中,在我国具有最高法律效力的是( )。
A.
民族自治地方条例
B.
宪法
C.
国际条约特别行政区基本法
D.
特别行政区基本法
【单选题】制肥皂时,皂化反应后加盐的作用是
A.
加大溶液密度
B.
催化作用
C.
与甘油反应
D.
盐析使肥皂析出
【简答题】制取肥皂的实验有以下步骤: 1在一个干燥的蒸发皿中加入植物油8mL、乙醇8mL、NaOH溶液4mL。 2在不断搅拌下,给蒸发皿中液体微微加热,直到混合物变稠。 3继续加热,直到皂化反应完成。 4把盛混合物的蒸发皿放在冷水浴中冷却。等待片刻,向混合物中加20mL热蒸馏水,再放在冷水中冷却。然后加入25mL NaCl饱和溶液充分搅拌。 5用纱布滤出固体物质,弃去滤液。把固体物质挤于、压成条状、晾干,即...
【简答题】一个周期为T的周期信号f(t),已知其指数形式的傅里叶系数为Fn,求下列周期信号的傅里叶系数。
【单选题】已知一脉冲信号其周期为1us,经过一个10分频器后,输出脉冲的周期为()。
A.
0.1us
B.
10us
C.
20us
D.
0.05us
【单选题】已知一脉冲信号其周期为10uS,经过一个四分频器后,输出脉冲的周期为()。
A.
40uS
B.
20uS
C.
10uS
D.
2.5uS
【单选题】下列各项中,在我国具有最高法律效力的是()。
A.
民族自治地方条例
B.
宪法
C.
国际条约
D.
特别行政区基本法
【单选题】肥皂的制作反应是:
A.
酯化反应
B.
中和反应
C.
置换反应
D.
以上均不是
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