电梯钢丝绳或链条最少应有两根,每根钢丝绳或链条应是独立的。()
参考答案:对
麻疹疫苗的接种对象是
A.二月龄婴儿
B.新生儿
C.八月龄婴儿
D.四月龄婴儿
E.六月龄婴儿
Eating more vegetables and fruit will keep you _____. [ ]
A. more healthier
B. health
C. healthiest
D. healthy