A. 对 B. 错
A. 1个 B. 2个 C. 3个 D. 4个
A. 双向传导 B. 绝缘性 C. 生理完整性 D. 容易疲劳性
Askquestionslike“WasIclear?”toencouragememberstoreacttoyourideas. B. Speakwithvitalityandenthusiasm. C. Offerreasonsforwhatyousay. D. Reinforcewhatyousaywithlooksandgestures.