In spite of all the hardship, he wants to (wide)_____ his knowledge of English.
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Task 4Directions: The following is a list of terms used for workplace safety. After reading it, you are required to find the items equivalent to those given in Chinese in the table below.
机器学习可分为
A. 监督式学习
B. 非监督式学习
C. 强化学习
D. 选择学习
表面粗糙度代号在图样上应标注在( )、( )或其延长线上,符号的尖端必须从材料外( )表面,代号中数字及符号的注写方向必须与( )方向一致。