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【单选题】
下列哪个说法错误( ) 。A.
圆形截面有无数个中性轴
B.
圆环形截面有无数个中性轴
C.
矩形截面有两个中性轴
D.
正方形截面有无数个中性轴
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【单选题】Wang Lin began his informative speech by saying: You hear a noise under the hood of your car, so you pull over to the side of the road. Your engine goes dead; you try to start the car, but it just sit...
A.
E stablishing his credibility as a speaker .
B.
E stablishing goodwill with the audience .
C.
Arousing the curiousity of the audience.
D.
S tating the importance of the topic .
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【单选题】Wang Lin began his informative speech by saying: You hear a noise under the hood of your car, so you pull over to the side of the road. Your engine goes dead; you try to start the car, but it just sit...
A.
Establishing his credibility as a speaker.
B.
Establishing goodwill with the audience.
C.
Arousing the curiosity of the audience.
D.
Stating the importance of the topic.
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