第1题:
Microwave communication uses high-frequency(56)waves that travel in straightlines through the air. Because the waves cannot(57)with the curvature of the earth, they can be(58)only over short distance. Thus, microwave is a good(59)for sending data between buildings in a city or on a large college campus. For longer distances, the waves must be relayed by means of "dishes" or(60).These can be installed on towers, high buildings, and mountain tops.
A.optical
B.radio
C.electrical
D.magnetic
第2题:
INTERTROPICAL CONVERGENCE ZONE OVER SOUTH PHILIPPINE PASSING OVER MINDANAO NORTHERN SULU AND PALAWAN.This paragraph is likely to be under the heading of ________ .
A.GALE WARNING
B.24 HRS FORECAST
C.SYNOPSIS
D.STORM WARNING
第3题:
What is the main difference between the two parts of the city?.
A. The colour of the buildings.
B. The age of the buildings.
C. The colour of the roofs.
D. The length of the streets.
第4题:
第5题:
In the Northern Hemisphere, the largest waves or swells created by a typhoon or hurricane will be located ______.
A.in the southeast quadrant of the storm
B.directly behind the storm center
C.forward and to the right of its course
D.behind and to the left of its course
第6题:
A place is moved from day into night and from night into day over and over by ______ of the earth.
A.the pushing B.the pulling C.the spinning D.the passing
第7题:
When a hurricane passes over colder water or land and loses its tropical characteristics,the storm becomes a(n)______.
A.High pressure area
B.Extratropical low-pressure system
C.Tropical storm
D.Easterly wave
第8题:
Swells that have outrun the storm are produced in the ______.
A.left front quadrant
B.right front quadrant
C.rear
D.directly ahead on the storms projected track
第9题:
第10题: