皮皮学，免费搜题
登录
搜题
【单选题】
河北省因位于（ ）下游以北而得名。A.
海河
B.
漳河
C.
黄河
D.
淮河
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】日常用的电池为锌锰干电池，其电极分别为碳棒和锌壳，以糊状NH 4 Cl作电解质（其中加入MnO 2 氧化吸收H 2 ），电极反应式为：Zn-2e - ═Zn 2+ ；2NH 4 + +2e - ═2NH 3 +H 2 ．根据叙述试判断下列说法中正确的是（ ）
A.
锌锰干电池中Zn为正极，碳棒为负极
B.
锌锰干电池工作时，电子由碳极经外电路流向Zn极
C.
锌锰干电池长时间连续使用时内装糊状物会流出腐蚀电器
D.
锌锰干电池能将化学能转化为电能和将电能转化为化学能
【单选题】Why is an initial letter very important? Please select the best answer.
A.
It is important because a successful initial letter will leave a good impression with other.
B.
It is important because it has some promotions.
C.
It is important because the buyer intends to purchase products with a proper price.
D.
It is important because the seller would like to market their products.
【简答题】A．The job hunters had to write an initial letter giving their life history. B．The job hunters had to pass some exams before applying for a job. C．The job hunters had to show qualifications in reading ...
【单选题】以前所用锌锰干电池的电极分别为锌筒和石墨棒,以糊状NH 4 Cl作电解质,电池反应为Zn +2NH 4 Cl+2MnO 2 ===Zn(NH 3 ) 2 Cl 2 +2MnO(OH)。 下列有关锌锰干电池的叙述中,正确的是( )
A.
干电池中锌筒为正极,石墨棒为负极
B.
干电池长时间连续工作后,糊状物可能流出,腐蚀用电器
C.
干电池工作时,电流方向是由锌筒经外电路流向石墨棒
D.
干电池可实现化学能向电能和电能向化学能的相互转化
【多选题】The basic structure of drafting an initial letter includes:
A.
Your writing purpose
B.
Introducing how you get the information
C.
Your quotation
D.
Your requirement
【简答题】某机电安装工程公司承接一汽车厂重型压力机车间机电设备安装工程，工程内容包括设备建造、压力机的就位安装、压力管道安装、自动控制工程、电气工程和单机试运行等。其中压力机最高22.5m，单件最重为105t。合同工期为4个月。合同约定，工期每推迟1d罚款10000元，提前1d奖励5000元。
该公司项目部对承接工程进行分析，工程重点是压力机吊装就位，为此，制定了两套压力机吊装方案。第一套方案，采用桅杆式...
【多选题】The basic structure of drafting an initial letter includes:
A.
Introducing how you get the information
B.
Your requirement
C.
Your writing purpose
D.
Your quotation
【多选题】The basic structure of drafting an initial letter includes:
A.
Your requirement
B.
Introducing how you get the information
C.
Your quotation
D.
Your writing purpose
【简答题】A．The job hunters had to write an initial letter giving their life history. B．The job hunters had to pass some exams before applying for a job. C．The job hunters had to show qualifications in reading ...
相关题目：