第1题
Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 through 40. For each question or statement there are 4 choices marked A, B, C, and D. You should make the correct choice.
Why don't birds get lost on their long flights from one place to another? Scientists have puzzled over this question for many years. Now they're beginning to fill in the blanks.
Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly by night? Tests with artificial stars have proved that certain night-flying birds are able to follow the stars in their long-distance flights.
A dove had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird's cage was placed under an artificial star-filled sky. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight.
But the stars are apparently their principal means of navigation. When the stars are hidden by clouds, they apparently find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it's too dark to see these, the doves circle helplessly, unable to find their way.
The reason why birds don't get lost on long flights ______.
A.have been known to scientists for years
B.have only recently been discovered
C.are known by everyone
D.will probably remain a mystery
第2题
Scientists think dolphins "talk" about everything from basic facts like their age to their emotional state. "I speculate that they say things like 'there are some good fish over here,' or 'watch out for that shark because he's hunting,'" says Denis Herzing, who studies dolphins in the Bahamas.
Deciphering(译解) "dolphin speak" is also tricky because their language is so dependent on what they're doing, whether they're playing, fighting, or going after tasty fish. During fights, for example, dolphins clap(碰撞) their jaws to say "Back off!" But their jaws clap while playing, too, as if to show who's king of the underwater playground.
How did the mother dolphin talk with her baby over the telephone?
A.Two connected tanks were separated for the talk.
B.A clear voice could be heard in the two separate tanks.
C.Both the mother dolphin and the baby knew each other.
D.A special underwater audio link was set up for the talk.
第3题
A.The subjects are overweight patients with Type 2 diabetes or prediabetes.
B.Both diets required participants to restrict their daily caloric intake.
C.The findings of the study differ from that of past studies.
D.The study carries weight in that it is the longest of its kind.
第4题
Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the
China has outlined a new approach to foreign investment, with planners saying they will now focus less on attracting large amounts of cash and more on selecting investments that will bring skills and technology into the country. The change in tactics,【B1】______ in an official document published by the National Development and Reform. Commission, comes after more than a year of【B2】______ debate over the role foreign investors should play in China's economy. China has long been one of the world's top【B3】______ for foreign investment, and international companies【B4】______ in more than $70 billion last year, drawn by the country's low costs,【B5】______ prowess and huge domestic market. But the inroads have caused some unease among both ordinary people and officials, who also want to see domestic companies do well. The new foreign-in vestment plan, which isn't a【B6】______ blueprint but rather a statement of broad【B7】______ , does say that regulators will look more closely at foreign takeovers of local companies and other issues of "national economic security" that have received increasing attention recently. But the vision it advances represents neither an attempt to【B8】______ close off China's economy nor a new round of liberalization. The planning agency said【B9】______ . For instance, new investments by foreign companies will face stricter environmental and land-use standards. On the other hand,【B10】______ . The plan said China will continue to open up service industries,【B11】______ . The commission also pledged to improve the business environment by reducing red tape and strengthening enforcement of intellectual-property rights.
【B1】
第5题
A (66) is basically an end point of a communication link between two applications.Sockets that extend over a network connect two or more applications running on separate computers at tached to the network.A socket (67) two addresses: (68) .Sockets provide a (69) communication channel between one or more systems.
There are stream and datagram sockets separately using TCP and (70) .
(66) A.program
B.UDP
C.socket
D.TCP
(67) A.is made of
B.composed of
C.is composed of
D.is consisted of
(68) A.Email address and IP address
B.MAC address and port address
C.MAC address and IP address
D.port number and IP address
(69) A.full-duplex
B.half-duplex
C.simplex
D.complex
(70) A.FTP
B.UDP
C.IP
D.HTTP
第6题
What advantages does the eye have over the radar ?
The eye has the following advantages:
Reliable
Sensitive to color
Can assess heading
Can identify small targets
Can see light configurations
Can assess ship types
Can identify conspicuous marks
Can identify flashing lights Has better discrimination
Can see changing weather patterns
Can see effect of sea on vessel
Not affected by blind arcs (if observer moves).
问题:BLIND ARCS mean ______ .
A.the arcs from which one can not see certain objects
B.the arcs which are blind
C.the black arcs
D.the arcs from which one can see certain objects
This paragraph is ______ .A.a clause of a contract
B.an explanation of advantage of eyes over radar
C.a requirement from a government
D.an article of Colreg
DISCRIMINATION means the ______ .A.provision
B.dimension
C.distinction
D.permission
The eye is more ______ than radar.A.distinguishable
B.reasonable
C.controllable
D.reliable
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