皮皮学，免费搜题
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【单选题】
为保证水的氯化消毒效果,使消毒剂和水接触 30 分钟后水中余氯为 。
A.
0.2 ～ 0.4mg/L
B.
0.5 ～ 0.6mg/L
C.
0.5 ～ 1mg/L
D.
1 ～ 2mg/L
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【判断题】配位滴定中,与EDTA反应较慢或对指示剂有封闭作用的金属离子一般应采用返滴定法进行测定。( )
A.
正确
B.
错误
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【判断题】15 0.4表示求15的十分之四是多少
A.
正确
B.
错误
查看完整题目与答案
【多选题】配位滴定中,在什么情况下不能采用直接滴定方式?
A.
待测离子与EDTA配位反应速率较慢,或能封闭指示剂,如Al3+、Cr3+等
B.
滴定反应缺乏变色敏锐的指示剂,如Ba2+、Sr2+等的滴定
C.
待测离子与EDTA不能形成配合物或形成的配合物不稳定,如碱金属
D.
待测离子本身易水解
查看完整题目与答案
【判断题】继承人在商标的有效期内继承商标专用权,若注册期满,继承人可以申请续展从而继续享有专用权。未申请续展的,继承人仍享有注册商标专用权。
A.
正确
B.
错误
查看完整题目与答案
【单选题】____ of plastics, the machines are easy to carry.
A.
To make
B.
Having made
C.
Being made
D.
Mad
E.
:D
F.
程度:中
G.
解析:
H.
We often provide our children with toys, footballs or basketballs, that all children like these things.
I.
thinking
J.
think K. to think L. thought
查看完整题目与答案
【单选题】These toys are made of tough plastic.
A.
difficult to do or deal with, and needing a lot of effort and determination
B.
able to live through difficult or severe conditions
C.
difficult to break or damage
D.
strict, firm
E.
difficult to cut or eat
F.
rough, violent
查看完整题目与答案
【单选题】下列哪个检查比率不属于客户信用额度中所需要检查的比率信息?
A.
应收票据比率
B.
应收账款比率
C.
未开票销货金额比率
D.
未出货订单金额比率
查看完整题目与答案
【单选题】The passage says that computer plays an essential part in______.
A.
traffic control
B.
mathematical computations
C.
the development of mathematical theory
D.
automation processes
查看完整题目与答案
【简答题】完形填空。 There are times in our lives when we remember. Remembering the good things of __ 1__ is a most precious (宝贵的) time; these memories are __ 2__ in the corner of my mind. When I was four years old,...
查看完整题目与答案
【简答题】以 M13 为载体克隆基因,能够得到_________ 。
查看完整题目与答案
相关题目：
【判断题】配位滴定中,与EDTA反应较慢或对指示剂有封闭作用的金属离子一般应采用返滴定法进行测定。( )
A.
正确
B.
错误
查看完整题目与答案
【判断题】15 0.4表示求15的十分之四是多少
A.
正确
B.
错误
查看完整题目与答案
【多选题】配位滴定中,在什么情况下不能采用直接滴定方式?
A.
待测离子与EDTA配位反应速率较慢,或能封闭指示剂,如Al3+、Cr3+等
B.
滴定反应缺乏变色敏锐的指示剂,如Ba2+、Sr2+等的滴定
C.
待测离子与EDTA不能形成配合物或形成的配合物不稳定,如碱金属
D.
待测离子本身易水解
查看完整题目与答案
【判断题】继承人在商标的有效期内继承商标专用权,若注册期满,继承人可以申请续展从而继续享有专用权。未申请续展的,继承人仍享有注册商标专用权。
A.
正确
B.
错误
查看完整题目与答案
【单选题】____ of plastics, the machines are easy to carry.
A.
To make
B.
Having made
C.
Being made
D.
Mad
E.
:D
F.
程度:中
G.
解析:
H.
We often provide our children with toys, footballs or basketballs, that all children like these things.
I.
thinking
J.
think K. to think L. thought
查看完整题目与答案
【单选题】These toys are made of tough plastic.
A.
difficult to do or deal with, and needing a lot of effort and determination
B.
able to live through difficult or severe conditions
C.
difficult to break or damage
D.
strict, firm
E.
difficult to cut or eat
F.
rough, violent
查看完整题目与答案
【单选题】下列哪个检查比率不属于客户信用额度中所需要检查的比率信息?
A.
应收票据比率
B.
应收账款比率
C.
未开票销货金额比率
D.
未出货订单金额比率
查看完整题目与答案
【单选题】The passage says that computer plays an essential part in______.
A.
traffic control
B.
mathematical computations
C.
the development of mathematical theory
D.
automation processes
查看完整题目与答案
【简答题】完形填空。 There are times in our lives when we remember. Remembering the good things of __ 1__ is a most precious (宝贵的) time; these memories are __ 2__ in the corner of my mind. When I was four years old,...
查看完整题目与答案
【简答题】以 M13 为载体克隆基因,能够得到_________ 。
查看完整题目与答案