()是防止电梯越程的第三道保护。
A.强迫减速开关
B.限位开关
C.极限开关
参考答案:C
肝硬化大量腹腔积液患者,检查肝脏时应采用下列哪种触诊法()
A.冲击触诊法
B.浅部触诊法
C.双手触诊法
D.钩指触诊法
E.深压触诊法
For nearly 50 years, Spock has been a ______ author writing 13 books including an autobiography and numerous magazine articles.
A.prevalent
B.precautious
C.prospective
D.prolific