职称英语考试

【单选题】The consequences go far beyond merely the loss of two pieces of property.Each satellite weighed more than half a metric ton and was moving at 7.5 kilometers per seconD、The resulting explosion was catastrophic (灾难性的), generating a massive cloud of cosmic debris—perhaps 100, 000 pieces of junk bigger than one centimeter in diameter, estimatesDavid Wright, a space expert at the Union ofConcerned Scientists. In one stroke, the accident increased by nearly a third the number of stray objects in the crucial 700 - to - 900 - kilometer band known as lowEarth orbit (LEO). The junk cloud will eventually disperse around the entire planet, like a shroud(遮蔽物).
According toDavid Wright’s estimation, the explosion of the two satellites may result in
A、100,000 pieces of junk bigger than one centimeter in diameter.
B、a massive cloud of cosmic debris beyond the lowEarth orbit.
C、a cloud of cosmic debris like a shroud around the sun.
D、a third of the number of stray objects in the lowEarth orbit.
网考网参考答案：A
网考网解析：
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