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【单选题】

暑いからといって、冷たいものばかり(     )。

A.
食べざるをえない
B.
食べるのはよくない
C.
食べるのがいい
D.
食べたくてたまらない    
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参考答案:
举一反三

【单选题】Passage FiveLaser-doppler radar () A.measures the movements of a spaceship by means of light beam B.makes use of microwaves C.makes use of sound waves D.Both A and B

A.
Passage Five
B.
A new kind of radar has been developed for spaceship travelers. A working laboratory model of a new system of radar that makes use of a beam of light is said to be ten thousand times more accurate than the best comparable system of radar that used microwaves.
C.
The model has shown that this radar system, known as laser-doppler radar, can measure with absolute precision speeds varying from spaceship orbital injection (进入) velocities (速度) of five miles per second down to virtual stops--speeds of less than one ten thousandth of an inch per second. According to the scientists who are developing this system, such fine measures of velocity are of prime importance in space missions. In a rendezvous (对接) between two spaceships, or in a landing approach by a vehicle onto an orbiting space station, a bump could rip open a ship’s skin, or a nudge could knock the station out of its orbit.
D.
The light-beam radar, which operates at a frequency of trillions (百万兆) of cycles per second, could easily detect and measure the movement of a vehicle edging up to a satellite space station. A control system using so precise a signal as this would allow a huge vehicle to dock at a space station as lightly as a feather.

【单选题】根管充填时紧密的充填材料应位于

A.
根尖(rootapex)
B.
根尖孔(apicalforamen)
C.
根尖牙骨质牙本质交界(cemento~ dentinaljunction)
D.
根尖分歧(apicalramification)
E.
根尖1/3处

【单选题】根尖切除术的适应证不包括

A.
根尖周囊肿
B.
根尖周病变广泛
C.
根折伴根尖断端移位,死髓
D.
根管内治疗器械折断出根尖孔
E.
根管充填完善而根尖周病变久治不愈

【单选题】After the passage the author will talk about______.

A.
the principles of designing lenses
B.
techniques of making contact lenses
C.
the design of photographic lenses
D.
styles of lenses
相关题目:
【单选题】Passage FiveLaser-doppler radar () A.measures the movements of a spaceship by means of light beam B.makes use of microwaves C.makes use of sound waves D.Both A and B
A.
Passage Five
B.
A new kind of radar has been developed for spaceship travelers. A working laboratory model of a new system of radar that makes use of a beam of light is said to be ten thousand times more accurate than the best comparable system of radar that used microwaves.
C.
The model has shown that this radar system, known as laser-doppler radar, can measure with absolute precision speeds varying from spaceship orbital injection (进入) velocities (速度) of five miles per second down to virtual stops--speeds of less than one ten thousandth of an inch per second. According to the scientists who are developing this system, such fine measures of velocity are of prime importance in space missions. In a rendezvous (对接) between two spaceships, or in a landing approach by a vehicle onto an orbiting space station, a bump could rip open a ship’s skin, or a nudge could knock the station out of its orbit.
D.
The light-beam radar, which operates at a frequency of trillions (百万兆) of cycles per second, could easily detect and measure the movement of a vehicle edging up to a satellite space station. A control system using so precise a signal as this would allow a huge vehicle to dock at a space station as lightly as a feather.
【单选题】根管充填时紧密的充填材料应位于
A.
根尖(rootapex)
B.
根尖孔(apicalforamen)
C.
根尖牙骨质牙本质交界(cemento~ dentinaljunction)
D.
根尖分歧(apicalramification)
E.
根尖1/3处
【单选题】根尖切除术的适应证不包括
A.
根尖周囊肿
B.
根尖周病变广泛
C.
根折伴根尖断端移位,死髓
D.
根管内治疗器械折断出根尖孔
E.
根管充填完善而根尖周病变久治不愈
【单选题】After the passage the author will talk about______.
A.
the principles of designing lenses
B.
techniques of making contact lenses
C.
the design of photographic lenses
D.
styles of lenses
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