钢丝绳式施工升降机的电气系统中,电路总开关采用具有()功能的漏电断路器。
A、过热
B、漏电
C、过载
D、短路保护
参考答案:B, C, D
China’s New Food Act provides for a food recall system to producers have to stop production their food isn’t up to standards.
A.that; if
B.where; if
C.which; when
D.when; where
外伤性眼内炎的治疗首选()
A.糖皮质激素
B.充分散瞳
C.玻璃体内药物灌注
D.大剂量抗生素
E.玻璃体切割术