皮皮学，免费搜题
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【多选题】
给铁路棚车时应使用的材料包括（ ）。A.
8号、10号镀锌铁线
B.
6号、7号的镀锌铁线
C.
环
D.
施封锁
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
【简答题】DNA甲基化修饰并没有改变DNA的_______,但却通过影响染色质的结构参与了基因的_______。
【单选题】下列有关说法正确的是 [ ]
A.
高温加热氧化镁和碳的混合物不能制取单质镁
B.
铁的冶炼过程是通过置换反应得到单质铁
C.
海水提溴的过程中不发生氧化还原反应
D.
利用电解的方法可以从海水中获取淡水
【单选题】最佳采购批量也称为经济批量，指的是( )。
A.
采购费用最低时的采购批量
B.
储存保管费用最低时的采购批量
C.
采购费用和储存保管费用均最低时的采购批量
D.
采购费用和储存保管费用之和最低时的采购批量
【单选题】Notice 1 All drivers are responsible for refueling their vehicles at the end of each shift. All other routine mainte nance should be performed by maintenance department personnel, who are also respons...
A.
are refueled when they have less than half a tank of gas.
B.
have the oil changed every 1,000 miles.
C.
are refueled at the end of every shift.
D.
are in frequent need of repair.
【单选题】Notice 1 All drivers are responsible for refueling their vehicles at the end of each shift. All other routine mainte nance should be performed by maintenance department personnel, who are also respons...
A.
maintenance-department personnel
B.
the drivers at the end of their shifts
C.
shift supervisors
D.
outside service mechanics
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