主页
学科
搜索
账户
常见问题
当前学科:地铁信号工
题目:
单选
SM8C作为中心公务电话交换机放置于车辆段中央设备室,通过传输系统提供的()与就近市话局(两个局向)相连提供本地市话、国内及国际长途通话业务。
A . RJ45
B . RS422
C . E1
D . RS232
答案:
<查看本题扣1积分>
查看答案
答案不对?请尝试站内搜索
推荐知识点:
脂质体在体内的作用机制错误的是()
回答题 Eggs are my favorite food.I like them 21 ,hard-boiled,scrambled,or poached.I eat eggs for 22 ,lunch,and dinner.I eat eggs here,there,and everywhere! Eggs taste great.You can eat them by 23 or as part of any meal.Eggs are 24 used as an ingredient in many prepared foods.Can you think of any foods that contain 25 ? Eggs are really a perfect food.They are 26 in most of the nutrients we need to maintain good 27 .When a baby chicken develops 28 an egg,the egg 29 and yolk are the only foods they need. Many people believe that eggs are 30 .They point out that eggs contain a very high amount of cholesterol(胆固醇).Too 31 of one kind of cholesterol in our blood can cause heart disease. There is no evidence that eggs 32 the harmful cholesterol in our blood.When we eat foods that are 33 in cholesterol,our bodies make 34 of it to balance,or adjust. If you want to enjoy a tasty and healthy food.eat plenty of 35
人体的哪个器官开始吸收乙醇类物质?()。
在进行注浆设计之前,要进行工程地质和岩土工程性质调查.调查的范围是()
哪些工业废水中常含有氟化物?请至少说出5个行业。
建筑安全监督机构在进行安全检查过程中,发现某施工单位在尚未竣工的建筑物内设置民工宿舍,则施工单位()。
在火灾报警控制器上,()灯亮,表示系统中存在被屏蔽的声光警报器。
患儿刘某,男,11岁。因高热1d由其父亲陪伴到某医院呼吸科就诊。接诊医生张某对刘某进行详细检查后,诊断为上呼吸道感染,嘱住院进一步检查治疗。但刘某的父亲以怕影响孩子学习为由,不同意住院检查治疗,并在病历上签署了"拒绝住院,后果自负"的意见。当晚刘某病情恶化,急送该院诊治,经抢救无效死亡。尸检病理诊断为暴发型脑炎。医师张某诊疗行为的性质应属于()
女,32岁。近几天神态变得奇怪,精神恍惚。从昨天起头痛、呕吐过数次。今晨没起床,嗜睡状态,即使起床又会立即睡着。头外伤史不详。现有发热、颈强、克尼格征阳性,轻度周围性面瘫,但无明显四肢瘫。以下检查结果中首先想了解的是哪项()
腰椎间盘突出症的治疗主要有哪几种方法?