职业技能鉴定是由考试考核机构对劳动者从事某种职业所应掌握的技术理论知识和实际操作能力做出客观的测量和评价。
参考答案:对
My friend has _____ hair than me, and he's _____ than me. [ ]
A. long, outgoing
B. more longer, more outgoing
C. longer, more outgoing
D. longer, outgoing
下列哪项是决定肺部气体交换方向的主要因素()
A.气体分子量大小
B.气体的溶解度
C.肺泡膜的通透性
D.气体和血红蛋白的亲和力
E.气体的分压差