行星齿轮与定轴轮系传动比较,在传递相同功率时,齿轮模数可以()。A、减小B、增大C、

题型:单项选择题

问题:

行星齿轮与定轴轮系传动比较,在传递相同功率时,齿轮模数可以()。

A、减小

B、增大

C、相等

D、反比

考点:综采维修电工综采维修电工(综合练习)综采维修电工(综合练习)题库
题型:单项选择题
We know  about the universe(宇宙). It means the earth, the sun, the moon, the stars, and the space  them.
Most of the stars are much than the moon, but they look smaller they are far away from the earth. At night, the moon is high in the sky a light. But the moon has  light of its own. The light of the moon comes from the sun. The sun gives us light, heat and life. And the plants, animals and men will die  the sun.
The earth goes around itself  . When the part of the earth  to the sun, it is day. The 10  part of the earth is night.
The earth is our homeland. We should love it.
小题1:
A.manyB.a lot ofC.muchD.few
小题2:
A.inB.betweenC.amongD.with
小题3:
A.fartherB.nearerC.warmerD.bigger
小题4:
A.becauseB.soC.butD.and
小题5:
A.looksB.likeC.looks likeD.as
小题6:
A.notB.noC.littleD.less
小题7:
A.withB.withoutC.inD.on
小题8:
A.a long timeB.in the daytime C.all the timeD.take after time
小题9:
A.turnsB.getsC.pointsD.changes
小题10:
A.frontB.followingC.oppositeD.same
题型:单项选择题

( )记录的数据在物理上不可改写。

A.磁卡

B.光卡

C.智能卡

D.逻辑加密卡

题型:单项选择题

男,63岁。因渐进性排尿困难,夜尿增多就诊,医生询问病史后给患者做检查

前列腺增生症的治疗方法很多,下列哪项治疗适合该患者()

A.根据全身情况及梗阻程度及前列腺增生部位选择治疗方法

B.药物治疗为主

C.手术并连同前列腺包膜一同切除

D.经 * * 前列腺切除术

E.激光等热疗治疗无效

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细胞分类学业已证明,植物界()和()多倍体的形成是物种起源的重要途径。

题型:单项选择题

庆祝中国人民解放军建军90周年阅兵在()隆重举行,习 * * 检阅部队并发表重要讲话,1万2千名官兵、600多台车辆装备集结列阵受阅。

A. * * 广场

B.朱日和联合训练基地

C.确山演习场

D.北京卫戍区

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