()幼儿喜欢问为什么,喜欢思考问题,看图书时能回答简单的问题。
A.1岁1个月~1岁6个月
B.1岁7个月~2岁
C.2岁1个月~2岁6个月
D.2岁7个月~3岁
参考答案:D
She started studying medicine at college, but_______to Business Studies in her second year.
A.transformed
B.skipped
C.adjusted
D.switched
可燃油与易燃油的区别在于其闪点界限不同,闪点小于()℃时为易燃油。
A.30
B.40
C.50
D.60