婴儿缺乏（）时，生长缓慢，并可能出现皮肤症状，如皮肤湿疹或皮肤干燥、脱屑等。
A、必需氨基酸
B、必需脂肪酸
C、磷脂
D、胆固醇
参考答案：B
中华文化源远流长、博大精深，对世界文明进步作出了重大贡献。中国传统文化中有许多精华，例如[ ]
①“民为邦本”的民本思想
②“尊师重教”的教育思想
③“己所不欲，勿施于人”的伦理思想
④“为朋友两肋插刀”的义气思想
A．②③④
B．①②③
C．①③④
D．①②④
Are the following two statements about the elasticity of labor demand correct Statement 1: Labor demand is more elastic in the short run than in the long run because other factors of production are fixed in the short run. Statement 2: The more labor-intensive a firm’s production processes, the more elastic the firm’s demand for labor will be. Statement 1 Statement 2 （）①A. CorrectCorrect ②B. CorrectIncorrect ③C. Incorrect Correct
A. ①
B. ②
C. ③
