| Scraps of food could soon be helping
power your home, thanks to an ultra-cheap bacteria-driven battery. Its
developers hope that instead of feeding the dog or making garden compost(混合肥料)
,organic household waste could top up your home’s electricity. Although such "microbial fuel cells" (MFCs)have been developed in the past, they have always proved extremely inefficient and expensive. Now Chris Melhuish and technologists at the University of the West of England(UWE)in Bristol have come up with a simplified MFC that costs as little as ￡10 to make. Right now, their fuel cell runs only on sugar cubes, since these produce almost no waste when broken down, but they aim to move on to carrot power. "It has to be able to use raw materials, rather than giving it a refined fuel," says Melhuish. Inside the Walkman-sized battery, A. The MFC is not a kind of new-developed fuel. B. The MFC was not spread used in the past partly because of its high cost. C. The MFC was proved to be able to power domestic appliance. D. The previous MFC can produce eight times as much power as the current organic battery. [单项选择]原始凭证有错误的，正确的处理方法是( )。
A. 向单位负责人报告 B. 退回，不予接受 C. 由出具单位重开或更正 D. 本单位代为更正 [单选题] 真菌的菌体为( )。
A.多细胞的分枝丝状体 B.单细胞个体 C.多细胞的分枝丝状体或单细胞个体 D.单细胞群体 [判断题]技能要求是指完成每一项工作内容应达到的结果或应具备的技能。
A.正确 B.错误 [判断题]煤气管道上安装的所有设备和附件在安装前都应进行清洗、涂油和试压。
A.正确 B.错误 [单选题]关于感受器的描述，下列不正确的是：（ ）。
A.感受器是感受刺激的结构 B.感受器是直接产生感觉的结构 C.感受器能转换能量形式 D.感受器参与反射和形成感觉 [单选题]647绝缘轨距块共有（）种规格
A.8 B.9 C.10 D.11 [单选题]一般而言，光伏电站的光伏支架设计使用年限应为（）年。
A.20 B.25 C.30 D.以上都不对 [判断题]午睡时断时续会搅乱生物钟。
A.正确 B.错误 [单选题]郑州地铁 3 号线列车运行采用 行车。
A.双线单向靠右侧 B.单线双向靠右侧 C.双线双向靠右侧 D.单线单向靠右侧 [单选题]断开耐张杆塔引线或工作中需要拉开断路器（开关）、隔离开关（刀闸）时，应先在其（）装设接地线。
A.两侧 B.受电侧 C.送电侧 D.任意一侧 [单选题]直流负极柜分合操作的前提条件是（）。
A.相应的直流进线柜处于合闸位置 B.相应的直流进线柜处于分闸位置 C.相应的直流馈线柜处于合闸位置 D.相应的直流馈线柜处于分闸位置 [填空题]《南昌铁路局客运站车火灾爆炸事故应急预案》(南铁客〔2017〕40号)，列车发生爆炸或火情后，列车工作人员应立即使用()，使列车停在安全地带。
[单项选择]{{B}}Text 3{{/B}}
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