在设计作业中的用力方法时，应尽量()。
A.减轻负荷
B.保持动作有节奏
C.采用立位作业
D.增加动作能级，减小动作幅度
参考答案：B
恶性度较高的胃癌发生跳跃式转移，最常见的部位是
A．肝十二指肠韧带淋巴结
B．脾门淋巴结
C．腹主动脉旁淋巴结
D．左侧锁骨上淋巴结
E．腹腔淋巴结
–I didn’t invite him to the party but he came anyway and got completely drunk.
--__________he hadn’t come! The party could have been a success.
A．How come
B．Only if
C．What if
D．If only
