以下可以用来作锥化操作的修改器有：（）

A:Bevel B:Lathe C:Taper D:Bend

以下应用于三维物体的修改器有（）。

A:Bend B:Taper C:Bevel D:Edit mesh

消声弯头bend muffler

以下哪一个属于3dmax8.0系统中的噪波修改器（）

A:Noise B:Editablepoly C:Bend D:FFD

以下可以应用于三维物体的修改器的有哪些？（）

A:Bend B:Taper C:Bevel D:Edit Mesh

A beam of light will not bend round the corners unless ______ to do so with the help of a reflecting device.

A:being done B:made C:to be made D:having made

A beam of light will not bend round the corners unless ______ to do so with the help of a reflecting device.

A:being done B:made C:to be made D:having made

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
Microwave communication uses (1) -frequency radio waves that travel in straightline sthrough the air. Because the waves cannot (2) with the curvature of the earth, they can be (3) only over short distance. Thus, microwave is a good (4) 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 (5) . These can be installed on towers, highbuildings, and mountain tops.

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