【单选题】There are _______ sports clubs in that sports center. [ ]
【单选题】大管轮班进晚餐时,其()的工作应由()下舱接替。
【单选题】What do you expect to find at sports center?
A.
Various sports facilities such as a gym and a swimming pool.
B.
Somewhere to do sports such as riding and cycling.
C.
The most important venue for sports competitions in a town.
【单选题】大管轮班进晚餐时,其半小时内的工作应由_下舱接替。
【判断题】Most children attend kindergarten at the age of 4 in America.
【单选题】如图所示的阶梯杆 AD 受三个集中力 F 作用,设 AB 、 BC 、 CD 段的横截面积分别为 A 、 2A 、 3A ,则三段的截面上 。