婴幼儿应多吃蛋、奶等食物,保证维生素D的摄入量,以防止因维生素D缺乏而引起
A. 呆小症
B. 异食癖
C. 佝偻病
D. 坏血病
Thenumberofmajorpointsyoucandevelopinaspeechdependsonthetimeyouhave.
A. 对
B. 错
Introducing irrelevantInformation ofthespeechhelpsustolettheaudiencefocus on the speech.
A. 对
B. 错
Using parallel structure to construct the main points ofyourspeechisagoodtechnique.
A. 对
B. 错