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单选题 A high-speed motion picture camera can take pictures per second at a rate close to infinity. An event that occurs too rapidly to be observed with the unaided eye can be recorded with such a camera. Then the event can be seen in detail when the motion picture is shown at _____
学科：24252工程学科英语
时间：2025-03-28 08:09:19
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题目1单选题
In Japan, the making of samurai swords is a highly developed art. The swords are fashioned entirely by hand. Since no one would use an imperfect swords, there are no "seconds" among samurai swords. Each new sword is carefully tested by its maker; and if it fails to meet the required standard, it is ______A. given awayB. immediately destroyedC. priced downD. used by the sword-maker
题目2单选题
Many deep-sea divers are lowered and raised by a crew on the surface and receive their oxygen supply through tubes to the surface. Skin-divers use an independent system called scuba, self-contained underwater breathing apparatus. Open-circuit scuba equipment allows bubbles of air to come to the surface. Navy skin-divers use a closed or semi-closed circuit apparatus. With this type of apparatus, the enemy cannot detect the diver's presence because ______A. no bubbles escape to the surfaceB. the diver is down too deepC. the apparatus blends with the seaD. there is not boat in sight
题目3单选题
Many of the regions where timbers-producing forests grow are places of heavy rainfall. The freshly cut trees contain too much moisture for first quality lumber. The lumber is heated in kilns, which are carefully controlled so that the lumber comes out having the proper ______A. strengthB. drynessC. ageD. thickness
题目4单选题
Mercury freezes at a higher temperature than alcohol does. In extremely cold climates, thermometers are filled with ______A. alcoholB. glassC. mercuryD. metal
题目5单选题
Forty persons working seven years fashioned a beautiful handmade lace garment. Lace-making machines can produce the lace for a beautiful garment in a few hours at a fraction of the cost of handmade lace. This makes it possible for more people to have ______A. a handmade garmentB. an expensive productC. lace garmentsD. nothing valuable
题目6单选题
A specially treated glass fabric that is able to withstand terrific heat is now available. Only a few layers of this fabric can afford protection and still allow bodily movement. Suits of this material are used by ______A. fire fightersB. lifeguardsC. deep-sea diversD. arctic explorers
题目7单选题
Stainless steel is an alloy of iron and chromium, or of iron, chromium, and nickel. It is practically free of the problems of rust and ordinary corrosion. It looks much like silver, but is not nearly so expensive. Because of its low cost, resistance to tarnish, and its beauty, stainless steel has become very popular for ______A. tablewareB. copper tubingC. lightweight luggageD. expensive necklaces
题目8单选题
A high-speed motion picture camera can take pictures per second at a rate close to infinity. An event that occurs too rapidly to be observed with the unaided eye can be recorded with such a camera. Then the event can be seen in detail when the motion picture is shown at _____A. the local cinemaB. a very slow rate of speedC. some later timeD. a rate of 100,000 pictures a minute
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