若一平面上的两平行直线对应平行于另一平面上的两平行直线，则这两平面相互平行。（ ）
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若两特殊位置平面相互平行，则它们具有积聚性的那组投影必相互平行。（ ）
A. 对
B. 错
Audience adaptation is an important factor in which of the following steps of the speechmaking process?1
A. formulating a specific purpose
B. writing an introduction and conclusion
C. choosing visual aids
D. all of the above
E. a and b only
According to your textbook, what is the most important early step in the process of developing a successful speech?
A. creating a preliminary bibliography
B. researching for speech materials
C. formulating the specific purpose
D. brainstorming for a central idea
E. selecting the residual message
According to your textbook, outlining is important to public speaking because an outline helps you judge whether
A. your main points are properly balanced.
B. your speech will be interesting to the audience.
C. you have adequate supporting materials for your main points.
D. all of the above.
E. a and c only.
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