设置图形控件Shape1的Curvature属性的值设置为99，则该图形是一个（）。

A:正方形或长方形 B:圆形或椭圆 C:圆角正方形或圆角长方形 D:其它三选项都不正确

Microwave communication uses  （） -frequency radio waves that travel in straightline sthrough the air. Because the waves cannot  （）  with the curvature of the earth, they can be  （）  only over short distance. Thus, microwave is a good  （）  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  （） . These can be installed on towers, highbuildings, and mountain tops.

A:reflex B:distort C:bend D:absorb

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

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:material B:equipment C:medium D:channel

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

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:transmitted B:transformed C:converted D:delivered

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:repeaters B:radars C:telephones D:antennas

形状控件的重要属性是( )

A:Top B:Caption C:Curvature D:Width