根据下列短文,回答下列各题。 Climate.more than any other single factor,determines the dist
A.to avoid being eaten by arctic animals
B.because fertilizer is not readily available
C.to minimize exposure to the cold
D.because unfrozen water supplies are very scarce
A.to avoid being eaten by arctic animals
B.because fertilizer is not readily available
C.to minimize exposure to the cold
D.because unfrozen water supplies are very scarce
A、prescribes
B、precedes
C、precludes
D、excludes
Biological Identification Technologies
When a person walks, the movement of his head, trunk, and limbs (肢体) are all reflected in changes in his body. A computer stores these __________ .(51) into a database (数据库). Later,the computer can accurately __________ (52) him according to these changes. This is a new biological identification __________ (53) and it can quickly identify an examinee without disturbing him.
Everybody&39;s voice is __________ (54).When a person&39;s voice is recorded by an instrument,his voice frequency spectrum (频谱) is called sound print. __________ .(55) a fingerprint,everybody&39;s sound print is different. How can a computer __________ (56)his sound? First, his voice is recorded, __________ .(57) allows the computer to become familiar with his voice. It will then turn his sound characteristics into a series of digits (数字). These are the __________ (58)
on which the computer can distinguish his voice from another&39;s.
We often bring ID cards, work cards, or driving licenses with us to __________(59) our identity. If all these cards are forgotten or lost. How can we prove whom we are? In __________(60), it&39;s not difficult to prove whom you are, __________(61) your body itself has identifying markers. Some are physiological (生理的) features, such as fingerprints, sounds, facial (面部) types and eye color. The computer can __________(62) to identify you. Suppose your features have already been __________(63)in the database. To identify you, we have to take your picture with a camera and send it to a computer for __________ (64). First, the computer needs to reposition this picture according to the position of your eyes, and then starts to read the __________(65) of your physiological features such as the ratio of your pupil to the whites of your eyes and the shape of your nose. Next, it seeks matching records from the database. Finally, it makes a decision.
_________ 查看材料
A.parts
B.changes
C.positions
D.directions
The use of containers, which started more than 40 years ago, in intercontinental traffic is now available in most sea cargo transport worldwide. The unit(1)is used to express the relative number of containers based on the equivalent length of a 20' container. The(2)container service broadly means that the whole container received by the carrier is packed at the shipper's or the forwarder's premises, and the delivery of that same whole container to the consignees. The(3)container service broadly means that the whole container received by the carrier is packed at the shipper's or the forwarder's premises, and that same whole container is emptied at the carrier's container freight station at the port of destination. The(4)broadly means that the delivery of the loose cargo to the carrier's container freight station at the port of origin is packed into the whole container, and the delivery of that same whole container to the consignees. The(5)container service broadly means that the delivery of the loose cargo to the carrier's container freight station at the port of origin is packed into the whole container, and that same whole container is emptied at the carrier's container freight station at the port of destination.
A、Phillis Wheatley Phillis
B、Philip Freneau
C、Emily Dickinson
D、Ann Bradstreet
A.at
B.in
C.for
D.on
In education, there should be a good balance among the branches of knowledge that contribute to effective thinking and wise judgment. Such balance is defeated by too much emphasis on any one field. This question of balance involves not only the relation of the natural sciences, the social sciences, and the arts but also relative emphases among the natural sciences themselves.
Similarly, we must have a balance between current and classical knowledge. The attention of the public is continually drawn to new possibilities in scientific fields and the discovery of new knowledge; these should not be allowed to mm our attention away from the sound, established materials that form. the basis of courses for beginners.
According to the first paragraph, the task of education is fairly complicated because ______.
A.the current public school system is too complicated to be understood
B.the public school system has no choice of what to teach
C.it is difficult to decide whether elementary science should be taught in public schools
D.the educators have to take care of both ordinary and gifted students
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