new radio devices should be developed for tracking the endangered blue whales
blue whales are no longer endangered with the use of the new listening system
opinions differ as to whether civilian scientists should be allowed to use military technology
military technology has great potential in civilian use
第1题:
Because of the strong sun, Mrs. White’s new dinning-room curtains ______ from dark blue to gray within a year.
A、disappeared
B、faded
C、paled
D、grew
第2题:
It can be inferred from the passage that the real danger comes from ______.
A)the asbestos dust that people take in
B) the contact of the worker's skin with asbestos particles
C) the inferior quality of the asbestos itself
D)the excessive use of man made asbestos material
第3题:
187. It is hard to track the blue whale, the ocean’s largest creature, which has almost been killed off by commercial whaling and is now listed as an endangered species. Attaching radio devices to it is difficult, and visual sightings are too unreliable to give real insight into its behavior. So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular blue whale for 43 days, monitoring its sounds. This was possible because of the Navy’s formerly top-secret system of underwater listening devices spanning the oceans. Tracking whales is but one example of all exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies. Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption for the first time and that they plan similar studies. Other scientists have proposed to use the network for tracking ocean currents and measuring changes in ocean and global temperatures. The speed of sound in water is roughly one mile a second, slower than through land but faster than through air. What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope (听诊器) does when it carries faint noises from a patient’s chest to a doctor’s ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles. [共5题]
(1) The passage is chiefly about ________.
(A) an effort to protect an endangered marine species
(B) the exposure of a US Navy top-secret weapon
(C) the civilian use of a military detection system
(D) a new way to look into the behavior. of blue whales
(2) The underwater listening system was originally designed ________.
(A) to monitor deep-sea volcanic eruptions
(B) to replace the global radio communications network
(C) to study the movement of ocean currents
(D) to trace and locate enemy vessels
(3) The deep-sea listening system makes use of ________.
(A) the unique property of layers of ocean water in transmitting sound
(B) the capability of sound to travel at hligh speed
(C) low-frequency sounds travelling across different layers of water
(D) the sophisticated technology of focusing sounds under water
(4) It can be inferred from the passage that ________.
(A) blue whales are no longer endangered with the use of the new listening system
(B) new radio devices should be developed for tracking the endangered blue whales
(C) military technology has great potential in civilian use
(D) opinions differ as to whether civilian scientists should be allowed to use military technology
(5) Which of the following is true about the US Navy underwater listening network?
(A) It has been replaced by a more advanced system.
(B) It is now partly accessible to civilian scientists.
(C) It became useless to the military after the cold war.
(D) It is indispensable in protecting endangered species.
正确答案:C D A C B
第4题:
第5题:
The author of the passage advises us to do all the following EXCEPT______.
A. we should think before, while and after we read a passage
B. we'd better look up every new word in a dictionary
C. we should learn to guess the meanings of new words
D. the clues in a passage should be made use of
34.答案为B 从第三段得知作者建议我们通过上下文猜出词义,不用每个词都查字典。
第6题:
A. CREATIVE USER susan;
B. CREATIVE OR REPLACE USER susan;
C. CREATE NEW USER susan DEFAULT
D. CREATE USER susan IDENTIFIED BY blue;
E. CREATE NEW USER susan IDENTIFIED BY blue;
F. CREATE OR REPLACE USER susan IDENTIFIED BY blue;
第7题:
A. Use a jumper from the motherboard where the new drive is going to be installed.
B. Use a jumper from a hard drive that is no longer functioning.
C. Contact the manufacturer of the new hard drive and have a replacement jumper shipped immediately.
D. The new hard drive must be replaced
第8题:
It can be inferred from the passage that all of the following are ways of producing new strains of influenza viruses EXCEPT______.
A. two influenza viruses in the same animal recombining
B. animal viruses recombining with human viruses
C. two animal viruses recombining in one animal
D. two animal viruses recombining in a human
第9题:
It can be inferred from the passage that Social Security privatization will_____.
[A] provide high returns for the new governments [B] be strongly opposed by Wall Street
[C] bring the future retirees more benefits [D] allow individuals to invest in personal accounts
第10题: