He left the room, _________.( ) A: his nose bled, his hands shake B: . his nose bled, his hands shaking C: his nose bleeding, his hands shake D: his nose bleeding, his hands shaking
He left the room, _________.( ) A: his nose bled, his hands shake B: . his nose bled, his hands shaking C: his nose bleeding, his hands shake D: his nose bleeding, his hands shaking
路灯一般使用的灯是() A: A高压钠灯 B: BLED灯 C: C荧光灯 D: D卤素灯
路灯一般使用的灯是() A: A高压钠灯 B: BLED灯 C: C荧光灯 D: D卤素灯
光纤的主要作用是传输信号,常用产生光信号的光源有两种,即()。 A: A发光二极管和半导体激光管 B: BLED管和晶体二极管 C: CILD管和激光二极管 D: D激光管和半导体晶体管
光纤的主要作用是传输信号,常用产生光信号的光源有两种,即()。 A: A发光二极管和半导体激光管 B: BLED管和晶体二极管 C: CILD管和激光二极管 D: D激光管和半导体晶体管
When I arrived there, the old man [u] [/u] with a knife, [u] [/u] a lot. 未知类型:{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: was wounded , bleeding B: had wounded, bled C: wounded, to bleed D: has been wounded, bleed
When I arrived there, the old man [u] [/u] with a knife, [u] [/u] a lot. 未知类型:{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: was wounded , bleeding B: had wounded, bled C: wounded, to bleed D: has been wounded, bleed
光通信领域中,LD和LED相比,主要区别在于() A: ALD发出的是激光,LED是荧光 B: BLED的谱线带宽较宽,调制效率低 C: CLD一般适用于大容量、长距离的传输系统 D: DLED成本低,适用于短距离、小容量的传输系统
光通信领域中,LD和LED相比,主要区别在于() A: ALD发出的是激光,LED是荧光 B: BLED的谱线带宽较宽,调制效率低 C: CLD一般适用于大容量、长距离的传输系统 D: DLED成本低,适用于短距离、小容量的传输系统
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