Do you think learning English is important? ( )
A. Very important
B. Not so important
C. Not important at all
查看答案
What do you think is the purpose of learning English?( )
A. To get a good job after graduation
B. To pass final exam
C. In order to go abroad
D. love the language
锯片配混料计算时，成型密度是指结合剂密度。
A. 对
B. 错
混结合剂时，先在研钵中把含量少于1%的成分混合均匀。
A. 对
B. 错
制造刀头配混成型料时，润湿剂用量为每20~25克金刚石一滴。
A. 对
B. 错
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