设备制造过程包括( )
A．工艺准备
B．生产准备
C．加工和装配
D．检验、试验和质量复审
E．包装和发运
参考答案：B,C,D,E
He often helps the students _______ he thinks are not quick at their studies.
A．whom
B．who
C．when
D．because
一线抗高血压药物有哪几类各举出一代表药。
