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【单选题】
有一对标准渐开线直齿圆柱齿轮传动,甲轮丢失,测得乙轮的齿顶圆直径da2为160mm,齿数Z2=78齿两轮的中心距为100mm,计算甲轮的模数m( )A.
1mm
B.
2mm
C.
3mm
D.
6mm
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举一反三
【简答题】对于______、______、______、______、______、______术后，生活不能自理的患者，护士应给予特殊口腔护理。
【单选题】介绍他人时一般按尊者_________,即“尊者优先了解情况”的原则,把较年轻的
A.
绍给较年长的人；把男士介绍给女士；把地位、身份低的人介绍给地位、身份高的人；把客人介绍给主人；把未婚者介绍给已婚者；把个人介绍给团体。
B.
居前
C.
在前
D.
居后
【单选题】I often doubt ______. [ ]
A.
that this song is worth listening to
B.
if this song is worth listening
C.
that this song is worth listening
D.
if this song is worth listening to
【判断题】Song Brocade was included in the World Intangible Cultural Heritage List in 2009.
A.
正确
B.
错误
【判断题】Suzhou Song Brocade was mainly used for court costumes and awards in the Ming and Qing dynasties.
A.
正确
B.
错误
【单选题】How does cloud brocade get its name?
A.
It’s mainly white.
B.
It’s usually as colorful as the rosy clouds in the evening.
C.
The patterns on the cloud brocade are mostly related with the sky.
D.
It’s originated in Nanjing.
【单选题】Do you know what ______? [ ]
A.
his favourite song is
B.
is his favourite song
C.
his favourite song
D.
his most favourite song is
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