A.类圆柱形或羊角状,表面灰黄色或棕褐色,气特异似焦糖
B.不规则的团块或长圆形,表面棕黑色或棕灰色
C.圆柱形,略弯曲,表面灰棕色至黯棕色,有较密的环状节,味极苦
D.扁圆柱形,表面灰黄色,外皮横向断裂而露出木部,形似连珠
E.根茎粗短,下生根数条,表面棕红色或黯棕红色
Bacteria are microscopic organisms
which live on the surface of objects. They are one of the most ancient living
things, which exist on this planet for nearly 4,000 million years. Do you know
the size of bacteria It can only be measured in microns. Maybe you have not a
standard in your mind how long a micron is. One micron is a thousandth of a
millimeter, which equals about the diameter of a pinhead. Therefore, even if we
enlarged the rounded bacterium a thousand times, it would only be the size of a
pinhead. We barely see bacteria by a magnification an ordinary microscope of 100
times, even if we try, we cannot make out anything of their structure. There are
normally millions of them together, for they can multiply really fast. Scientists have found that some bacteria have attached to wavy-looking "hairs" called flagella. T A. Bacteria are as big as a pinhead. B. Bacteria can not be seen by an ordinary microscope. C. Bacteria are hard to see because they often live together. D. Bacteria are very small so they can only be measured in microns. [单选题]航空器通过比较两个30HZ信号的( )来得到飞机相对DVOR台的方位。
A.幅度 B.相位 C.包络 D.时间差 [判断题]根据《安全生产法》,生产经营单位主要负责人在本单位发生重大生产安全事故时,不立即组织抢救或者在事故调查处理期间擅离职守或者逃匿的,可追究的责任有降职处分、撤职处分、对逃匿的处15日以下拘留等。()
A.正确 B.错误 [多选题]高层建筑消防用电线路有( )安全要求。
A.当采用暗敷设时,应敷设在不燃烧体或难燃烧体结构内,且保护层厚度不宜小于30mm B.当采用暗敷设时,应敷设在不燃烧体结构内,且保护层厚度不宜小于20mm C.当采用暗敷设时,应敷设在不燃烧体结构内,且保护层厚度不宜小于30mm D.当采用明敷设时,应采用金属管或在封闭式金属线槽,并采取防火保护措施 E.当采用绝缘和护套为不延燃材料的电缆时,可不穿金属管保护,但应敷设在电缆井内 [单选题]采集系统支持()综合查询功能,并提供组合条件方式查询相应的数据页面信息。
A.数据 B.信息 C.资料 D.设备 [单选题]汽油发动机应有良好的启动性能,()(1分)
A. 不得有'回火'放炮'现象 B. 动力性能允许低于原额定功率的75% C. 发动机不允许在低温下启动3次 [单选题]犯罪嫌疑人甲在实施盗窃犯罪时,被群众发现,群众欲将其扭送至公安机关时,其持刀反抗,杀害一名群众。民警王某赶到现场后,经警告无效,果断开枪击中其腿部,甲扔掉凶器失去继续犯罪的能力。此时,民警应当立即停止射击,并()。(1.0分)
A.收回枪支 B.持枪戒备 C.鸣枪警告 D.关闭强制保险 [单选题]不需要记入排出量的内容是
A.胸腹腔吸出液 B.胃肠减压液 C.胆汁引流液 D.呕吐液 E.汗液 [判断题]装、拆接地线,应作好记录,交接班时应交待清楚。
A.正确 B.错误 [单项选择]根据有关规定的要求,当年形成的会计档案在会计年度终了后,可暂由本单位财务会计部门保管( ) 年。
A. 5 B. 3 C. 2 D. 1 [单项选择]()应当指定专门的儿童结核病定点医疗机构。
A. 国家级 B. 省级 C. 市级 D. 县级 [判断题]NNL1-4 数据通信系统在OCC、设备集中站、车辆段和停车场为各信号设备提供接口。
A.正确 B.错误 [多选题]汛期消防救援队伍遂行跨区域抗洪抢险任务,按照( )等程序组织实施。
A.接受指令 B.队伍集结 C.编队开赴 D.救援作业 E.安全归建 我来回答: 提交
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