皮皮学，免费搜题
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【单选题】
某高速重载设备保养时,换用了粘度较原来稍低的润滑油,结果使用不久齿轮就发生了失效。试判断最可能了生的哪种失效?( )。
A.
轮齿折断
B.
齿面磨损
C.
齿面点蚀
D.
齿面胶合
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举一反三
【单选题】What can be inferred from the fourth paragraph?
A.
Farm areas accept waste from the city in modern society.
B.
There is cheap land to bury waste in modem society.
C.
It is difficult to find space to bury waste in modem society.
D.
Ways to deal with waste in modem society is similar to that of the past.
查看完整题目与答案
【单选题】What can be inferred from the fourth paragraph?
A.
Farm areas accept waste from the city in modern society.
B.
There is cheap land to bury waste in modern society.
C.
It is difficult to find space to bury waste in modern society.
D.
Ways to deal with waste in modern society stay the same.
查看完整题目与答案
【单选题】Her beauty ________ him and he swore to stay with her forever.
A.
admired
B.
cheated
C.
swayed
D.
captured
查看完整题目与答案
【单选题】已知 25 °C 时 , 某二元弱酸 H 2 A 的 K a1 θ = 1.0×10-7 , K a2 θ = 1.0×10 -14 , 则 0.10mol ・ kg -1 H 2 A 溶液中 A 2– 的浓度约为 1.0×10 -14 mol·Kg -1 ; 在 0.10 mol·Kg -1 H 2 A 和 0.10 mol·Kg -1 盐酸混合溶液中 A 2- 的浓度约为( )。
A.
5.6×10 -16 mol·Kg -1
B.
1.6.0×10 -18 mol·Kg -1
C.
1.0×10 -20 mol·Kg -1
D.
2.1×10 -19 mol·Kg -1
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【简答题】How can waste from living things be reused?
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【单选题】What can an exhaust system do if it is efficient?
A.
It can prevent the waste gas from escaping.
B.
It can let the waste gas and compound escape quickly out of it.
C.
It can prevent the engine from producing waste gas.
D.
It can store as much waste gas as possible.
查看完整题目与答案
【单选题】已知 25 °C 时 , 某二元弱酸 H 2 A 的 K a1 θ = 1.0×10 -7 , K a2 θ = 1.0×10 -14 ,则 0.10mol ・ kg -1 H 2 A 溶液中 A 2– 的浓度约为( ) ; 在 0.10 mol·Kg -1 H 2 A 和 0.10 mol·Kg -1 盐酸混合溶液中 A 2- 的浓度约为 1.0×10 -20 mol·Kg -1 。
A.
1.0×10 -14 mol·Kg -1
B.
1.3×10 -14 mol·Kg -1
C.
2.1×10 -14 mol·Kg -1
D.
3.1×10 -14 mol·Kg -1
查看完整题目与答案
【判断题】效度只有程度上的差异，没有“全”和“无”。
A.
正确
B.
错误
查看完整题目与答案
【简答题】有关的技术分析著作常将缺口划分为??、??、持续性缺口和消耗性缺口四种形态。
查看完整题目与答案
【单选题】What can be inferred from the fourth paragraph?
A.
Farm areas accept waste from the city in modem society.
B.
There is cheap land to bury waste in modem society.
C.
It is difficult to find space to bury waste in modem society.
D.
Ways to deal with waste in modem society stay the same.
查看完整题目与答案
相关题目：
【单选题】What can be inferred from the fourth paragraph?
A.
Farm areas accept waste from the city in modern society.
B.
There is cheap land to bury waste in modem society.
C.
It is difficult to find space to bury waste in modem society.
D.
Ways to deal with waste in modem society is similar to that of the past.
查看完整题目与答案
【单选题】What can be inferred from the fourth paragraph?
A.
Farm areas accept waste from the city in modern society.
B.
There is cheap land to bury waste in modern society.
C.
It is difficult to find space to bury waste in modern society.
D.
Ways to deal with waste in modern society stay the same.
查看完整题目与答案
【单选题】Her beauty ________ him and he swore to stay with her forever.
A.
admired
B.
cheated
C.
swayed
D.
captured
查看完整题目与答案
【单选题】已知 25 °C 时 , 某二元弱酸 H 2 A 的 K a1 θ = 1.0×10-7 , K a2 θ = 1.0×10 -14 , 则 0.10mol ・ kg -1 H 2 A 溶液中 A 2– 的浓度约为 1.0×10 -14 mol·Kg -1 ; 在 0.10 mol·Kg -1 H 2 A 和 0.10 mol·Kg -1 盐酸混合溶液中 A 2- 的浓度约为( )。
A.
5.6×10 -16 mol·Kg -1
B.
1.6.0×10 -18 mol·Kg -1
C.
1.0×10 -20 mol·Kg -1
D.
2.1×10 -19 mol·Kg -1
查看完整题目与答案
【简答题】How can waste from living things be reused?
查看完整题目与答案
【单选题】What can an exhaust system do if it is efficient?
A.
It can prevent the waste gas from escaping.
B.
It can let the waste gas and compound escape quickly out of it.
C.
It can prevent the engine from producing waste gas.
D.
It can store as much waste gas as possible.
查看完整题目与答案
【单选题】已知 25 °C 时 , 某二元弱酸 H 2 A 的 K a1 θ = 1.0×10 -7 , K a2 θ = 1.0×10 -14 ,则 0.10mol ・ kg -1 H 2 A 溶液中 A 2– 的浓度约为( ) ; 在 0.10 mol·Kg -1 H 2 A 和 0.10 mol·Kg -1 盐酸混合溶液中 A 2- 的浓度约为 1.0×10 -20 mol·Kg -1 。
A.
1.0×10 -14 mol·Kg -1
B.
1.3×10 -14 mol·Kg -1
C.
2.1×10 -14 mol·Kg -1
D.
3.1×10 -14 mol·Kg -1
查看完整题目与答案
【判断题】效度只有程度上的差异，没有“全”和“无”。
A.
正确
B.
错误
查看完整题目与答案
【简答题】有关的技术分析著作常将缺口划分为??、??、持续性缺口和消耗性缺口四种形态。
查看完整题目与答案
【单选题】What can be inferred from the fourth paragraph?
A.
Farm areas accept waste from the city in modem society.
B.
There is cheap land to bury waste in modem society.
C.
It is difficult to find space to bury waste in modem society.
D.
Ways to deal with waste in modem society stay the same.
查看完整题目与答案