Laser-dopple radar ______ . [br] Laser-dopple radar is especially valuable in sp

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问题 Laser-dopple radar ______ . [br] Laser-dopple radar is especially valuable in space missions because it ______ .

选项 A、is one thousand times more precise than microwave radar
B、provides precise measures of the velocity of space vehicles
C、is a new system of radar
D、can measure the movement of a spaceship less accurately than a microwave radar

答案 B

解析根据第二段：...laser-dopple radar, can measure with absolute precision...such fine measures of velocity are of prime importance.

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Laser-dopple radar ______ . [br] Laser-dopple radar is especially valuable in sp

【B1】[br]【B8】A、NormallyB、EspeciallyC、GraduallyD、NearlyAnormally意为“正常地，通常地”；

Attentiontodetailissomethingeveryonecanandshoulddoespeciallyina

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—Tinalooksespeciallyprettytonight.—Yes,shealwayslooksherbestin____

Thismagazineisofgreat______tothestudentsofchemistry.A、valuableB、value

Attentiontodetailissomethingeveryonecanandshoulddo—especiallyina

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