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【多选题】
Which of the following examples support the idea that traditions and customs of different cultures are transmitted by communicating through a commonly used language.A.
An exchange student in MIT from Hunan, China, who talks about Lao Gan Ma chili sauce in English, is transmitting Hunan cuisine culture.
B.
During the Rio Olympic Games, athletes and tourists from all over the world can talk in English about their own liveliest festivals when enjoying the Rio carnival march.
C.
With English as a lingua franca, a French can talk with a Chinese at a pub in Berlin.
D.
An Egyptian businessman can negotiating a contract by using English in a English-speaking country.
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【单选题】Which of the following is not true?
A.
Several leaders in education made great efforts to promote the educational innovations.
B.
Church leaders influenced education a lot before the progressive changed.
C.
College entrance requirements were elevated in the late 1800s.
D.
The sense of public duty was neglected in the late 1800s.
【多选题】加工路线是指数控机床加工过程中刀具的运动轨迹和方向。它影响零件的加工精度和表面粗糙度。加工路线的确定应考虑以下几点
A.
应减少进退刀时间和其它辅助时间
B.
尽量采用组合夹具
C.
在铣削加工零件轮廓时，尽量采用顺铣加工方式
D.
选择合理的进、退刀位置，尽量避免沿零件轮廓法向切入和进给中途停顿
E.
加工路线一般是先加工外轮廓，再加工内轮廓