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【判断题】
欲使一对轴线平行的齿轮在啮合过程中，维持传动比恒定不变，那么该对齿廓应符合：啮合轮齿的工作侧齿廓啮合线与连心线的交点为定点，且两轮的模数和压力角必须分别相等。A.
正确
B.
错误
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反馈参考答案：
举一反三
【判断题】Some martial arts were imvented for the purpose of exercising the monks' bodies.
A.
正确
B.
错误
【单选题】There they met two Indian monks who were Buddhist masters and ______ as educators without salary. [ ]
A.
were working
B.
worked
C.
have work
D.
had worked
【单选题】How many monks were there in the team which visited the Jerusalem?
A.
20
B.
22
C.
24
D.
26
【单选题】These monks were versed in the ways of magic, and they had a portal that would allow them to travel across distant lands ( ).
A.
instantaneously
B.
gratefully
C.
obviously
D.
triumphantly
【多选题】涅克拉索夫1860年代主要创作长诗反映现实生活,3首关于农村题材的长诗(),着力表现破产农民的悲伤与愤懑。
A.
《幻想与声音》
B.
《货郎》
C.
《铁路》
D.
《严寒，通红的鼻子》
【简答题】简述全球定位系统(GPS)。
【单选题】First, silkworm eggs were national secret, to which country or city were they smuggled by two monks?
A.
Constantinople.
B.
Constantine.
C.
Nepal.
D.
none of these.
【单选题】There they met two Indian monks who were Buddhist masters and ______ as educators without salary.
A.
were working
B.
worked
C.
have work
D.
had worked
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