【单选题】Which is the hottest season?
【单选题】Which is ___season in Beijing?
【多选题】下列选项中,哪些是现代和后现代的标志性知识?()
【单选题】Which season is the author’s favorite season?
【简答题】Which season is the peak tourist season ?
【简答题】如图所示实现的是拉门自动开闭控制:拉门的开闭采用气压控制,开闭动作为往复运动,因此执行元件采用双作用气缸,当活塞杆外伸时关门,收回时开启。试分析其工作过程。
【单选题】Which season is it probably now?
【简答题】某物料搬动机械手的结构如图所示,动作过程如图所示,要求机械手的操作方式分为手动方式和自动方式。机械手有升降、水平移动、手爪夹持等3个自由度,采用电磁阀控制的气缸驱动,PLC控制。要求写出物料搬动机械手设计和产品开发的详细工程路线。
【单选题】According to the passage which season is right?
A.
Spring is from January to March.
B.
The trees turn green in summer.
C.
Autumn is a busy season.
D.
We don't have many interesting sports in winter.
【单选题】When it is winter in China, which season is in Sydney?