英语专业八级改错练习题及答案解析(八十七)
Since 1965, when is equipment became operational, adevice called Eros has been helped to make sky traffic__1__
safe. Eros is short for Eliminate Range Zero System?
range zero meaning collision. Basically Eros is a computer
system measures, with great speed and precision, closing__2__
speed ( the speed at which two objects are approaching
each other ) and range ( the distance apart of the objects ).
Eros can warn aircraft approachable each other at jet__3__
speeds and can provide protection for as many as a thousand
aircraft in wide area. The pilot of an Eros?equipped aircraft
heading for a collision hear a warning noise in his ear?phones__4_
when his airborne computer calculates that he is within thirty
seconds or half a mile ( whichever occurs first ) of other aircraft.__5__
At the same time, a flashing red arrow on the device's indicator
panel instructs him to climb. Simultaneously, in the other aircraft, __6__
the signal is automatically reversed: the flashing arrow tells the
pilot to climb. The newer Eros II system can accommodate a total
of two thousands aircraft at one time within a 140?mile radius__7__
Every three seconds, each Eros?equipped plane automatically
reports to ground stations and to similarly equipped aircraft
their precise range, altitude and approach rate. The producers__8__
of Eros, the McDonnell Dougals Corporation in the U.S., are
now studying the fitting of Eros and will do more to make__9__
the sky safer: they shall also lighten the work of air?traffic__10__
controllers and increase the efficiency of airports.
英语专业八级改错练习题及答案解析(八十七)
答案：1. helped—helping
现在完成进行时
2. measures前加that/which
that/which引导定语从句，修饰先行词a computer system
3. approachable—approaching
approaching为现在分词，修饰aircraft，相当于that/which
are approaching each other
4.hear—hears
其主语是the polit
5. other—another
相对于上提到的an Eros?equipped aircraft， 此处为另一架飞机
6. climb—descend
根据上下文的意义，一架飞机下降，另一架飞机上升，以免相撞
7.thousands—thousand
根据语法规则，数词hundred 、thousand 、million等词一般为单数形式
8. their—its
指上文中的主语each equipped plane
9. 去掉make前的to
do与make并列作动词谓语
10. shall—will
表示一般将来，shall常用于第一人称，will则常用于第二和第三人称
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