皮皮学，免费搜题
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搜题
【单选题】
伤风病人气管切开的主要指征是
A.
呼吸中枢麻痹
B.
肺部感染
C.
抽搐频繁而不易用药物控制
D.
胸腹肌强直，呼吸受限
E.
吞咽困难
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
【单选题】已知 25 °C 时, E θ (Fe 3+ | Fe 2+ ) = 0.77 V , E θ (Sn 4+ | Sn 2+ ) =0.15 V 。今有一电池,其电池反应为 2 Fe 3+ + Sn 2+ === Sn 4+ +2 Fe 2+ ,则该电池的标准电动势 E θ (298 K) 为:( )
A.
(A) 1.39 V ；
B.
(B) 0.62 V ；
C.
(C) 0.92 V ；
D.
(D) 1.07 V 。
查看完整题目与答案
【简答题】已知 25 °C 时, E θ (Fe 3+ | Fe 2+ ) = 0.77 V , E θ (Sn 4+ | Sn 2+ ) =0.15 V 。今有一电池,其电池反应为 2 Fe 3+ + Sn 2+ === Sn 4+ +2 Fe 2+ ,则该电池的标准电动势 E θ (298 K) 为:( ) (5.0分)A. 1.39 V B. 0.62 V C. 0.92 V D. 1.07 V
查看完整题目与答案
【简答题】25 °C 时,对电池 Pt |Cl 2 ( p θ ê Cl - ( a =1) || Fe 3+ ( a =1) , Fe 2+ ( a =1) ê Pt : ( 1 )写出电池反应; ( 2 )计算电池反应的 D r G m θ 及 K θ 值; ( 3 )当 Cl - 的活度改变为 a (Cl - ) = 0.1 时, E 值为多少? (已知 E θ (Cl - |Cl 2 |Pt) =1...
查看完整题目与答案
【单选题】You were opposed to______ to go with us to the library, weren't you?
A.
our inviting her
B.
us invite her
C.
that we invite her
D.
we inviting her
查看完整题目与答案
【单选题】From this passage we can infer that ______.
A.
we'll invite the craftsmen to teach at the college
B.
schools and books are not the only way to knowledge
C.
scientific discoveries are based on personal experience
D.
discoveries and rediscoveries are the most important source of knowledge for a college student
查看完整题目与答案
【单选题】已知25°C时,E θ (Fe 3+ | Fe 2+ ) = 0.77 V,E θ (Sn 4+ | Sn 2+ ) =0.15 V。今有一电池,其电池反应为2 Fe 3+ + Sn 2+ === Sn 4+ +2 Fe 2+ ,则该电池的标准电动势E θ (298 K) 为( )
A.
1.39 V
B.
0.92 V
C.
0.62 V
D.
1.07 V。
查看完整题目与答案
【单选题】______before we leave tomorrow, we should invite all our friends to hold a party to welcome them.
A.
Had they come back
B.
Were they coming back
C.
Were they ti5 come back
D.
Would they come back
查看完整题目与答案
【简答题】We would like to invite you to a p_________ (展示).
查看完整题目与答案
【单选题】From this passage we can infer that ______.
A.
we'll invite the craftsman to teach in the college
B.
schools and books are not the only way to knowledge
C.
scientific discoveries late based on personal experience
D.
discoveries and rediscoveries are the most important source of knowledge for a college student
查看完整题目与答案
【单选题】We are happy_______ you to the party for our friends from Beijing.
A.
invite
B.
invite to
C.
inviting
D.
to invite
查看完整题目与答案
相关题目：
【单选题】已知 25 °C 时, E θ (Fe 3+ | Fe 2+ ) = 0.77 V , E θ (Sn 4+ | Sn 2+ ) =0.15 V 。今有一电池,其电池反应为 2 Fe 3+ + Sn 2+ === Sn 4+ +2 Fe 2+ ,则该电池的标准电动势 E θ (298 K) 为:( )
A.
(A) 1.39 V ；
B.
(B) 0.62 V ；
C.
(C) 0.92 V ；
D.
(D) 1.07 V 。
查看完整题目与答案
【简答题】已知 25 °C 时, E θ (Fe 3+ | Fe 2+ ) = 0.77 V , E θ (Sn 4+ | Sn 2+ ) =0.15 V 。今有一电池,其电池反应为 2 Fe 3+ + Sn 2+ === Sn 4+ +2 Fe 2+ ,则该电池的标准电动势 E θ (298 K) 为:( ) (5.0分)A. 1.39 V B. 0.62 V C. 0.92 V D. 1.07 V
查看完整题目与答案
【简答题】25 °C 时,对电池 Pt |Cl 2 ( p θ ê Cl - ( a =1) || Fe 3+ ( a =1) , Fe 2+ ( a =1) ê Pt : ( 1 )写出电池反应; ( 2 )计算电池反应的 D r G m θ 及 K θ 值; ( 3 )当 Cl - 的活度改变为 a (Cl - ) = 0.1 时, E 值为多少? (已知 E θ (Cl - |Cl 2 |Pt) =1...
查看完整题目与答案
【单选题】You were opposed to______ to go with us to the library, weren't you?
A.
our inviting her
B.
us invite her
C.
that we invite her
D.
we inviting her
查看完整题目与答案
【单选题】From this passage we can infer that ______.
A.
we'll invite the craftsmen to teach at the college
B.
schools and books are not the only way to knowledge
C.
scientific discoveries are based on personal experience
D.
discoveries and rediscoveries are the most important source of knowledge for a college student
查看完整题目与答案
【单选题】已知25°C时,E θ (Fe 3+ | Fe 2+ ) = 0.77 V,E θ (Sn 4+ | Sn 2+ ) =0.15 V。今有一电池,其电池反应为2 Fe 3+ + Sn 2+ === Sn 4+ +2 Fe 2+ ,则该电池的标准电动势E θ (298 K) 为( )
A.
1.39 V
B.
0.92 V
C.
0.62 V
D.
1.07 V。
查看完整题目与答案
【单选题】______before we leave tomorrow, we should invite all our friends to hold a party to welcome them.
A.
Had they come back
B.
Were they coming back
C.
Were they ti5 come back
D.
Would they come back
查看完整题目与答案
【简答题】We would like to invite you to a p_________ (展示).
查看完整题目与答案
【单选题】From this passage we can infer that ______.
A.
we'll invite the craftsman to teach in the college
B.
schools and books are not the only way to knowledge
C.
scientific discoveries late based on personal experience
D.
discoveries and rediscoveries are the most important source of knowledge for a college student
查看完整题目与答案
【单选题】We are happy_______ you to the party for our friends from Beijing.
A.
invite
B.
invite to
C.
inviting
D.
to invite
查看完整题目与答案