| Centuries ago, man found out that
removing moisture from food helps to preserve it, and that the easiest way to do
this is to expose the food to sun and wind. All foods contain water—cabbage and other leaf vegetables contain as much as 92% water, potatoes and other root vegetables 80%, lean meat 70% and fish anything from 80% to 60% depending on how fatty it is. If this water is removed, the activity of the bacteria(细菌) which cause food to go bad is checked. At present most foods are dried mechanically. The conventional method of such dehydration (脱水) is to put food in chambers through which hot air is blown at temperature of about 110℃ at entry to about 43℃ at exit. This is the usual method for drying such things as vegetables, minced meat and fish. Liquids such as milk, coffee, tea, soup and egg may be dried by pouring them over A. the fattier fish contains as much water as the lean ones B. the fattier the fish is the more water it may contain C. a fatty fish holds less water than a lean one D. the water content of fish has nothing to do with the content of their fat [单选题]热通过流动介质将热量由空间中的一处传到另一处的现象叫做( )。
A.对流 B.传导 C.辐射 D.照射 [填空题]高压设备的基本绝缘安全用具有( )。
[单项选择]不仅使用风险管理建立在科学的基础上，而且使风险分析定量化，为风险管理者进行风险决策、选择最佳管理技术提供科学依据的风险管理环节是（）。
A. 风险识别 B. 风险评价 C. 风险测量 D. 风险估测 [单选题]邻近10kV带电线路工作时，人体、导线、施工机具等与带电线路的距离应满足（ ）m要求。
A.1 B.0.7 C.0.4 D.0.9 [判断题]消火栓按钮可直接启动消防水泵并接收消防水泵的动作反馈信号。（ ）
A.正确 B.错误 [简答题]简述典型流感的主要临床特点有哪些？
[单项选择]下列各项中，免纳营业税的是( )。
A. 学生勤工俭学提供劳务取得的收入 B. 电信业的营业收入 C. 运输业取得的运费收入 D. 转让无形资产取得的收入 [判断题]退票费的尾数以5角为单位，尾数小于5角的舍去、5角以上的进为1元。
A.正确 B.错误 [判断题]低压开关（熔丝）拉开（取下）后，应在适当位置悬挂“禁止合闸，有人工作！”或“禁止合闸，线路有人工作！”标示牌。
A.正确 B.错误 [多项选择]幽门螺杆菌的生物学特性是（）
A. 革兰阴性 B. 细长弯曲菌 C. 微需氧 D. 需要一定的湿度 E. 氧化酶试验阴性 [单项选择]Two years ago I bought a bike. If you live in a town, it is often (1) than a car and you don’t have to worry (2) parking(车辆的停放). You can (3) it anywhere.
(4) it has a seat at the back and a basket at the front, I can take my small daughter to school, to the library, shopping, anywhere in fact. I use it mostly in summer (5) the weather is warm and dry. In winter when there is snow or ice on the road, it can be very dangerous(危险的)to go out (6) bike, so you have to be very (7) . Accidents(事故)are not the only problems though. One day I (8) on it and when I came out of the supermarket I found (9) front wheel (车轮)missing. It was a long walk to the bike shop!Now I (10) three strong locks. A. go shopping B. went shopping C. went to shopping [简答题]While we get on well with a number of people, we are usually friends with only a very few--for example, the average among students is about 6 per person.
[多选题]依据《消防监督检查规定》，结合本地区火灾发生的特点规律，适时对（）等单位遵守消防法规、落实消防责任情况进行监督检查抽查，并依法实施消防行政处罚和行政强制措施。
A.机关 B.团体 C.企业 D.事业 [单选题]1.12办理机动车驾驶证补证业务时,不属于受理岗审核事项的是________。
A.通过计算机管理系统核查申请人不具有记满12分、逾期未审验、被扣押、扣留、暂扣、注销、吊销或者撤销机动车驾驶证的情形 B.《机动车驾驶证申请表》 C.公安机关报案证明 D.身份证明 [单选题]与其他平面形状的机翼比较，矩形机翼具有失速首先出现在哪一部位的趋势？
A.翼尖，能提供充分的失速警告 B.翼根，能提供充分的失速警告 C.翼根，能提供充分的失速警告 D.翼根，不能供充分的失速警告 [单选题]在碎石道床地段，每组防爬器设备的组成标准是：双方向锁定为2对防爬器和（ ）对支撑。
A.2 B.3 C.4 D.5 [单选题]关于舷角的计量是。( )
A. 以船首为0°,顺时针以0°~360°计量 B. 以船首为0°,向左或向右,以0°~180°计量 C. 'A、B都对 D. 'A、B都错 [填空题]在KeyPress事件过程中，KeyAscii是所按键的 【6】 值。
[多选题]表示车辆通过性能的技术参数是：（ ）
A.转弯半径 B.接近角 C.离去角 D.最小离地间隙 [多选题]举高消防车的安全装置主要由( )组成。
A.顺序控制机构 B.软腿报警机构 C.底盘调平装置 D.自动断油系统 [单项选择]焦化脱萘主要有哪两种方法（）。
A. 酸洗和水洗 B. 水洗和油洗 C. 碱洗和油洗 [单选题]哪项实验室检查不符合多发性骨髓瘤
A.高钙血症 B.高尿酸血症 C.异常免疫球蛋白增多，以IgM型为主 D.血清白蛋白正常或减低 E.尿中出现本-周蛋白 [判断题]纸币缺少三分之一的，应按全额兑换。
[判断题]隔离开关主要用来隔断电源,不能用来操作电压互感器。
A.正确 B.错误 我来回答: 提交
|
