[单项选择]

Text 4
Virtually everything astronomers know about objects outside the solar system is based on the detection of photons-quanta of electromagnetic radiation. Yet there is another form of radiation that permeates the universe: neutrinos. With (as its name implies) no electric charge, and negligible mass, the neutrino interacts with other particles so rarely that a neutrino can cross the entire universe, even traversing substantial aggregations of matter, without being absorbed or even deflected. Neutrinos can thus escape from regions of space where light and other kinds of electromagnetic radiation are blocked by matter. Not a single, validated observation of an extraterrestrial neutrino has .so far been produced despite the construction of a string of elaborate observatories, mounted on the earth from Southern India to Utah to South Africa. However, the detection of extraterrestrial neutrinos are of great significance in the study of astronomy. Neutrinos carry with
A. Neutrinos can cross the entire universe.
B. Neutrinos can escape from different regions of space.
C. Neutrinos seldom interact with other particles.
D. Neutrinos are too rare in the space.

Text 4
Virtually everything astronomers know about objects outside the solar system is based on the detection of photons-quanta of electromagnetic radiation. Yet there is another form of radiation that permeates the universe: neutrinos. With (as its name implies) no electric charge, and negligible mass, the neutrino interacts with other particles so rarely that a neutrino can cross the entire universe, even traversing substantial aggregations of matter, without being absorbed or even deflected. Neutrinos can thus escape from regions of space where light and other kinds of electromagnetic radiation are blocked by matter. Not a single, validated observation of an extraterrestrial neutrino has .so far been produced despite the construction of a string of elaborate observatories, mounted on the earth from Southern India to Utah to South Africa. However, the detection of extraterrestrial neutrinos are of great significance in the study of astronomy. Neutrinos carry with
A. Labs with massive detector.
B. Enclosed volcanic caves.
C. Vacuum cabins.
D. Shallow salt lake.

Text 2
Virtually every company with a computer is vulnerable to computer abuse, crime and accident. Security of the computer and of the information and assets contained within it are therefore of paramount importance to management. Skilled computer criminals can break into a computer system far more easily than an armed robber can gain access to a bank vault, and usually with far less risk of apprehension and punishment. A slight change in a complex program can bring about the misappropriation of thousands of pounds. Accidental erasure of crucial data can paralyse company’s operations. Anyone familiar with the necessary procedure can gain access to information stored in the computer, no matter how confidential, and utilize it for his own purposes.
Although the actual extent of computer crime is difficult to measure, most experts agree that it is one of the fastest growing areas of illegal activity. The principal reason for both the growth and the lack
A. direct theft of funds
B. the theft of data for corporate espionage or extortion
C. accumulating fractions of pence from individual payroll accounts
D. all of the above