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【单选题】
齿轮泵的困油现象是( )
A.
为保证齿轮连续传动，必须要求前一对轮齿尚未脱开前，后一对轮齿就要进入啮合，即重叠系数大于 1 ，因此有一部分液体被困在两对轮齿、啮合线前后端盖之间形成的密封可变容积内。
B.
为了消除困油现象，可以采取一些卸荷措施，使密封容积及时与吸油或液体压油腔连通。
C.
在轴套或者是在前后端盖上开两个卸荷槽。
D.
当密封容积由大变小时，被困在容积的液体受到挤压，压力急剧升高。从缝隙强行挤出，这时齿轮和轴承受到很大的径向力，功率损失增加，磨损加剧。
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参考答案：
举一反三
【单选题】If you shift all the parallel rays a bit up from their present location, the focal point will
A.
move a bit down from its present location.
B.
move a bit up from its present location.
C.
remain unchanged.
D.
move a bit to the right from its present location.
E.
move a bit to the left from its present location.
查看完整题目与答案
【多选题】货运合同中托运人的义务有（）。
A.
如实申报所托运的货
B.
按照约定的方式包装货物
C.
按照合同约定支付运费
D.
保障货物安全
E.
提取货物
查看完整题目与答案
【单选题】According to this passage some women want to give up _________.
A.
their present position in society
B.
their marriage
C.
their right to equal pay
D.
their home life
查看完整题目与答案
【单选题】Lucy looks unhappy today. Let’s give her this present _________ .
A.
to cheer her up
B.
cheer her up
C.
cheer up her
D.
to cheer up her
查看完整题目与答案
【单选题】According to this passage some women want to give up _______.
A.
their present position in society
B.
their marriage
C.
their fight to equal pay
D.
their home life
查看完整题目与答案
【多选题】几年前，王刚创立了一间小公司，公司规模虽然小，但在创立之初王刚就非常重视团队建设。在短短几年，他的公司就成为了上海一家知名企业，那么在网络时代团队的优势包括（ ）。
A.
有利于高效率地实现组织目标
B.
有利于组织内和谐关系的维系
C.
有利于个人的满足与成长
D.
有利于实现与顾客的零距离对接
查看完整题目与答案
【多选题】实现围护结构的节能,就应提高建筑物的 ( ) 保温隔热性能
A.
外墙
B.
屋面
C.
楼地面
D.
门窗
查看完整题目与答案
【单选题】Why did the woman give up her present job?
A.
Because she was not interested in her present job.
B.
Because she wanted to find more chances to be promoted.
C.
Because the company she worked for went bankrupt.
D.
Because she wanted to find a well-paid job.
查看完整题目与答案
【简答题】某企业于2006年成立，领取了营业执照、房产产权证、土地使用证各一件，资金账簿记载其注册资金为1350万元，并设有8本其他账簿。当年发生如下经济业务： (1)订立借款合同一份，所载金额为40万元，另订立财产抵押合同一份，拟将一辆小汽车作为上述借款的抵押物，合同未载明金额。 (2)向某汽车运输公司租人2辆载重汽车，租期为5个月，租金合计为7.万元。同时签订了运输合同，约定运输费用为5万元，其中包含装...
查看完整题目与答案
【单选题】At the present time the brush can NOT be used to ______.
A.
sweep up tiny pieces of nanodust
B.
paint microstructures
C.
soak toxins from water
D.
find medical uses
查看完整题目与答案
相关题目：
【单选题】If you shift all the parallel rays a bit up from their present location, the focal point will
A.
move a bit down from its present location.
B.
move a bit up from its present location.
C.
remain unchanged.
D.
move a bit to the right from its present location.
E.
move a bit to the left from its present location.
查看完整题目与答案
【多选题】货运合同中托运人的义务有（）。
A.
如实申报所托运的货
B.
按照约定的方式包装货物
C.
按照合同约定支付运费
D.
保障货物安全
E.
提取货物
查看完整题目与答案
【单选题】According to this passage some women want to give up _________.
A.
their present position in society
B.
their marriage
C.
their right to equal pay
D.
their home life
查看完整题目与答案
【单选题】Lucy looks unhappy today. Let’s give her this present _________ .
A.
to cheer her up
B.
cheer her up
C.
cheer up her
D.
to cheer up her
查看完整题目与答案
【单选题】According to this passage some women want to give up _______.
A.
their present position in society
B.
their marriage
C.
their fight to equal pay
D.
their home life
查看完整题目与答案
【多选题】几年前，王刚创立了一间小公司，公司规模虽然小，但在创立之初王刚就非常重视团队建设。在短短几年，他的公司就成为了上海一家知名企业，那么在网络时代团队的优势包括（ ）。
A.
有利于高效率地实现组织目标
B.
有利于组织内和谐关系的维系
C.
有利于个人的满足与成长
D.
有利于实现与顾客的零距离对接
查看完整题目与答案
【多选题】实现围护结构的节能,就应提高建筑物的 ( ) 保温隔热性能
A.
外墙
B.
屋面
C.
楼地面
D.
门窗
查看完整题目与答案
【单选题】Why did the woman give up her present job?
A.
Because she was not interested in her present job.
B.
Because she wanted to find more chances to be promoted.
C.
Because the company she worked for went bankrupt.
D.
Because she wanted to find a well-paid job.
查看完整题目与答案
【简答题】某企业于2006年成立，领取了营业执照、房产产权证、土地使用证各一件，资金账簿记载其注册资金为1350万元，并设有8本其他账簿。当年发生如下经济业务： (1)订立借款合同一份，所载金额为40万元，另订立财产抵押合同一份，拟将一辆小汽车作为上述借款的抵押物，合同未载明金额。 (2)向某汽车运输公司租人2辆载重汽车，租期为5个月，租金合计为7.万元。同时签订了运输合同，约定运输费用为5万元，其中包含装...
查看完整题目与答案
【单选题】At the present time the brush can NOT be used to ______.
A.
sweep up tiny pieces of nanodust
B.
paint microstructures
C.
soak toxins from water
D.
find medical uses
查看完整题目与答案
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