【简答题】一个运动构件在平面中具有 __________ 个自由度。
【简答题】Dragon Boat Festival
【判断题】比赛时球从标志杆上方进入对方场区是好球?
【单选题】流体在泵、风机或水压头等作用下产生的流动称为 .
【单选题】What will you eat during the Dragon Boat Festival中Dragon Boat Festival是什么意思?
【简答题】一个构件作平面运动时具有______个自由度,在平面机构中一个低副引入_____个约束,一个高副引入______个约束。
【判断题】比赛时球从标志杆上方进入对方场区是好球。
【单选题】Which of the following statements is not related with the significance of the Dragon Boat Festival?
A.
The Dragon Boat Festival is a patriot’s ode.
B.
The Dragon Boat Festival is a joyful song for foodies.
C.
The Dragon Boat Festival is an occasion to worship the dragon.
D.
The Dragon Boat Festival is a battle hymn for racers.
【单选题】Dragon Boat Festival
【单选题】Dragon Boat Festival