牵张运动主要适用于（）
A.关节挛缩
B.关节疼痛
C.关节强直
D.肌肉瘫痪
E.肌肉萎缩
参考答案：A
Under the classification system used by the U.S. Bureau of Labor Statistics, which of the following people would NOT be considered unemployed Someone who:（）
A. was terminated from his last job.
B. quit and is looking for new work.
C. is disabled and unable to return to work.
在PLC中随机存取存储器使用下面哪个单词表示（）
A.ROM
B.RAM
C.EPROM
D.EEPROM
