自动线传动轴连接部分是否需要安装防护罩？否则会导致什么伤害？
参考答案：自动线传动轴连接部分需要安装防护罩。否则会造成手或衣服卷入作业线传动轴，导致铰伤。
轮廓算术平均偏差Ro的单位是( )。
A．km
B．mm
C．m
D．μm
This autumn term, spring term, or academic year program offers advanced students an opportunity to improve their spoken arid written Chinese, and to be familiar with a range of people and organizations that are helping to shape China’s relationship with the United States and the world. All students who take intermediate or advanced Chinese language may take a choice to participate in the Professional Development Program that includes guest lectures by Chinese and foreign professionals on areas such as politics, foreign affairs, economics, trade, media, art and culture. This program is supplemented by field trips and short journeys in and around Beijing. Housing and meals: Students live in the foreign student dormitories and take meals in the dormitory dining hall or local restaurants. Requirements: Two years of college-level Chinese and one Chinese studies courser graduate students accepted. Program Fee: 2005 Autumn Term: ＄6995; 2006 Spring Term: ＄7995. Fees include tuition, housing and all meals, cultural activities, local journeys and field trips, insurance, and the International Student Identity Card.
How many requirements are there for one who wants to be accepted to the program
