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已知int a=4;,表达式a+=a-=a*a的值是
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【简答题】听录音，选择你所听到的句子。 ( ) 1. A. This is my father. B. This is my friend. C. This is my grandpa. ( ) 2. A. The fish is nice. B. The fish is big. C. The picture is nice. ( ) 3. A. I have forty penc...
【简答题】已知X与Y的相关系数Corr(X,Y)=0.25,则Corr(2X+3,4Y+8)=____。
【简答题】阅读理解。 1. This is _______ for Kesington Hotel in London. A. a notice B. a postcard C. a picture D. an advertisement 2. A single room and a double room in Kesington Hotel cost _______ each night. A. ￡ 6...
【简答题】何谓自动加速现象?并解释产生的原因。
【简答题】阅读理解 Now, please look at this picture. This girl is my sister. Her name is Sally! She is l3 years old. She is in Class Two, Grade Seven. This boy is aunt's son. He is my cousin. His name is Jeff. He i...
【单选题】What is the correct speed input to an ARPA used for traffic surveillance?
A.
speed from GPS
B.
speed from Doppler
C.
ground speed
D.
speed through water
【单选题】在TN接零保护系统中，通过总漏电保护器的工作零线与保护零线之间 ( ) 。
A.
必须再做电气连接
B.
不得再做电气连接
C.
必须再做设备连接
D.
不得再做线路连接
【单选题】A recent spate of launching and operating mishaps with television satellites led to a corresponding surge in claims against companies underwriting satellite insurance. As a result, insurance premiums ...
A.
Since the risk to insurers of satellites is spread over relatively few units, insurance premiums are necessarily very high.
B.
When satellites reach orbit and then fail, the causes of failure are generally impossible to pinpoint with confidence.
C.
The greater the performance demands placed on satellites, the more frequently those satellites break down.
D.
Most satellites are produced in such small numbers that no economies of scale can be realized.
E.
Since many satellites are built by unwieldy international consortia, inefficiencies are inevitable.
【简答题】完型填空。 A picture 1 on my desk. This is a picture 2 Tom’s family(家). The man is Tom’s 3 . A 4 is behind Tom. She is 5 mother. 6 teachers. A girl is 7 the picture, too. She is Tom’s sister. 8 name is Amy...
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