皮皮学，免费搜题
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【多选题】
用直接滴定法测定阿司匹林含量,以下叙述正确的是
A.
反应摩尔比为1:1
B.
在中性乙醇溶液中滴定
C.
用盐酸滴定液滴定
D.
以中性红为指示剂
E.
滴定时应在不断振摇下稍快进行
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举一反三
【单选题】以R134a代替过去常用的氟利昂作制冷剂,以下说法不对的是_____。
A.
不能用硅胶做干燥剂
B.
必须改用适于它的脂类润滑油
C.
排气温度高需采用水冷
D.
不能用卤素检漏灯
查看完整题目与答案
【判断题】建造固定资产专门借款的利息在建设期内发生的计入固定资产成本,不属于建设期发生的计入当期费用。
A.
正确
B.
错误
查看完整题目与答案
【单选题】One day, a poor boy who was trying to pay his way through school by selling goods door to door found that he only had one dime left. He was hungry so he decided to beg for a meal at the next house. Ho...
A.
traveling expenses to school
B.
school tuition fee
C.
his meals
D.
a glass of milk
查看完整题目与答案
【单选题】以R134a代替过去常用的氟利昂作制冷剂，以下说法不对的是_______。
A.
不能用硅胶做干燥剂
B.
必须改用适于它的脂类润滑油
C.
排气温度高需采用水冷
D.
不能用卤素检漏灯
查看完整题目与答案
【单选题】NPN 型三极管放大器 中 , 若三极管的基极电位低于发射极电位,则( )。
A.
三极管集电结将正偏
B.
三极管处千截止状态
C.
三极管将深度饱和
D.
无影响
查看完整题目与答案
【简答题】One day, a poor boy who was trying to pay his way through school by sending newspapers door to door, was so hungry that he decided to beg for a meal at the next house. However, he lost his nerve when ...
查看完整题目与答案
【单选题】关于磁共振成像中射频脉冲的特点,下列说法不正确的是
A.
磁化质子
B.
具有磁场成分
C.
使质子同相位进动
D.
为电脉冲，电磁波的一种
E.
以上都不正确
查看完整题目与答案
【简答题】One day, a poor boy who was trying to pay his way through school by selling goods door to door found that he had ten cents left. He was hungry so he decided to beg* for a meal at the next house. Howev...
查看完整题目与答案
【单选题】NPN型三极管放大器中,若三极管的基极电位低于发射极电位,则( )。
A.
三极管集电结将正偏
B.
三极管处于截止状态
C.
三极管将深度饱和
D.
无影响
查看完整题目与答案
【单选题】以R134a代替过去常用的氟利昂作制冷剂,下列说法不正确的是。
A.
必须改用适于它的脂类润滑油
B.
不能用卤素检漏灯
C.
不能用硅胶作干燥剂
D.
排气温度高'需采用水冷
查看完整题目与答案
相关题目：
【单选题】以R134a代替过去常用的氟利昂作制冷剂,以下说法不对的是_____。
A.
不能用硅胶做干燥剂
B.
必须改用适于它的脂类润滑油
C.
排气温度高需采用水冷
D.
不能用卤素检漏灯
查看完整题目与答案
【判断题】建造固定资产专门借款的利息在建设期内发生的计入固定资产成本,不属于建设期发生的计入当期费用。
A.
正确
B.
错误
查看完整题目与答案
【单选题】One day, a poor boy who was trying to pay his way through school by selling goods door to door found that he only had one dime left. He was hungry so he decided to beg for a meal at the next house. Ho...
A.
traveling expenses to school
B.
school tuition fee
C.
his meals
D.
a glass of milk
查看完整题目与答案
【单选题】以R134a代替过去常用的氟利昂作制冷剂，以下说法不对的是_______。
A.
不能用硅胶做干燥剂
B.
必须改用适于它的脂类润滑油
C.
排气温度高需采用水冷
D.
不能用卤素检漏灯
查看完整题目与答案
【单选题】NPN 型三极管放大器 中 , 若三极管的基极电位低于发射极电位,则( )。
A.
三极管集电结将正偏
B.
三极管处千截止状态
C.
三极管将深度饱和
D.
无影响
查看完整题目与答案
【简答题】One day, a poor boy who was trying to pay his way through school by sending newspapers door to door, was so hungry that he decided to beg for a meal at the next house. However, he lost his nerve when ...
查看完整题目与答案
【单选题】关于磁共振成像中射频脉冲的特点,下列说法不正确的是
A.
磁化质子
B.
具有磁场成分
C.
使质子同相位进动
D.
为电脉冲，电磁波的一种
E.
以上都不正确
查看完整题目与答案
【简答题】One day, a poor boy who was trying to pay his way through school by selling goods door to door found that he had ten cents left. He was hungry so he decided to beg* for a meal at the next house. Howev...
查看完整题目与答案
【单选题】NPN型三极管放大器中,若三极管的基极电位低于发射极电位,则( )。
A.
三极管集电结将正偏
B.
三极管处于截止状态
C.
三极管将深度饱和
D.
无影响
查看完整题目与答案
【单选题】以R134a代替过去常用的氟利昂作制冷剂,下列说法不正确的是。
A.
必须改用适于它的脂类润滑油
B.
不能用卤素检漏灯
C.
不能用硅胶作干燥剂
D.
排气温度高'需采用水冷
查看完整题目与答案