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【简答题】
如图3-29所示,试设计一铰链四杆机构,已知其摇杆CD长度lCD=75mm,急回特性系数K=1.5,机架AD长度lAD=100mm,摇杆的一个极限位置与机架的夹角φ=45o,求曲柄长度lAB和连杆长度lDC。 请将计算过程和答案以图片的格式上传至答案区
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【单选题】Read the paragraph from the introduction [paragraphs 1-6]. Boys wear one color while girls wear another. Students say the practice can be a difficult choice for some teens who are transgender or who d...
A.
Some transgender students agree that boys should wear one color gown while girls wear another.
B.
Some transgender students are fine with two graduation gown colors as long as they get to choose.
C.
Some transgender students are put in a tough situation when schools sort graduation gowns by gender.
D.
Some transgender students have had a hard time convincing schools to have two graduation gown colors.