【单选题】The teacher asked a very difficult question. It was Ted who finally _____ a good answer.
【判断题】装配图标注中,各零件序号指引线不允许相交。( )
【简答题】将句子改写为问句。 You can answer the phones. ________________________
【单选题】有抗B凝集素,红细胞膜无D抗原,其血型属于:
【单选题】抗B凝集素,红细胞膜无D抗原,其血型属于
【简答题】In an American classroom, a Chinese girl was asked to answer a question. She stood up and smiled, without any sound. The American teacher looked at himself and didn’t see anything funny. So he ...
【单选题】抗B凝集素,红细胞膜无D抗原,其血型属于
【判断题】装配图标注中,各零件序号指引线不允许相交。 答案:
【多选题】关于装配图上的零件序号编写,下面哪一项是错误的?
A.
零件指引线可以多次弯折,以避开视图投影或其他标注。
B.
零件序号编写应横平竖直,按顺时针或逆时针顺序排列。
D.
一组紧固件或装配关系清楚的零件组可采用公共指引线。
E.
为了排列美观清晰,指引线尽可能沿45度或135度方向画出。