油浸式变压器(电抗器)精益化评价细则要求:事故油坑鹅卵石大小鹅卵石铺设满足厚度不小于()mm。
A.210
B.220
C.230
D.250
参考答案:D
Though measures have now been taken to prevent further price hikes, many people remain _______ over the rising cost of food.
A.be concerning
B.concerns
C.concern
D.concerned
长沙有3家企业进入“全国成长性服务外包企业100强”,它们是?