【简答题】A) still late B) too late C) so late D) past
【简答题】螺纹升角ψ增大,联接的自锁性__,传动效率__;牙型角α增大,则联接的自锁性__,传动效率__。 (供选项:A.提高 B.不变 C.降低)
【单选题】His parents told him not ________. [ ]
【单选题】No one except Jack and Tom ________ the meeting.
【判断题】螺纹升角 y 增大,则联接的自锁性降低,传动的效率提高。()
【单选题】'Late (late, late, late!)nights are the norm' (Para. 5)is closest in meaning to '______.'
A.
She works more efficiently at night
B.
She often reads story books at night
C.
She usually works late into the night
D.
She normally mails packages at night
【单选题】The earthquake happened in ______.
【简答题】螺纹升角ψ增大,则联接的自锁性(),传动的效率()。