[单项选择]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

[单项选择]Microwave communication uses high-frequency (71) waves that travel in straightlines throughthe air. Because the waves cannot (72) with the curvature of the earth, they can be (73) only over short distance. Thus, microwave is a good (74) for sendingdata between buildings ina city or on a large college campus. For longer distances, the wavesmust be relayed by means of"dishes" or (75) . These can be installed on towers, highbuildings, and mountain tops.

A. optical
B. radio
C. electrical
D. magnetic

[单项选择]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. reflex
B. distort
C. bend
D. absorb

[单项选择]Passage TwoA. Communication actually takes place when the message is received.
B. There are more means of receiving than of sending communications.
C. Reception of communication involves use of the senses.
D. It is hard to organize by typing the means of sending communication.

[单项选择]The methods of communication used during the war were （primitive）.
A. reliable
B. effective
C. alternative
D. simple

[填空题]Nonverbal Communication
Nonverbal communication is usually referred to as the "hidden
dimension" of communication, which is at times so (1) ______ that we (1) ______
hardly recognize it. Our intense emotions are usually conveyed by gestures,
body position, facial expression, vocal (2) ______, eye contact, use of (3) (2) ______
______, and touching. (3) ______
Two points about how nonverbal communication functions:
--The nonverbal cues are sometimes the only way to communicate.
--The nonverbal cues can help interpret the verbal message. The cues can
signal the message of humor and (4) ______. (4) ______
Another area of nonverbal communication:
Body bubbles, also termed proxemics, refers to our (5) ______ space. (5) ______
We’re seldom conscious of body bu