Joseph Addison s chief contribution to literature lies in his essays written for The Spectator and（）

Generally speaking, English literature of the 18th century may be divided into three periods. The first period was characterized by the neo-classicism, （）of which was the representative poet. 点击查看答案

龙门架(井字架)物料升降机在现场使用，其安全防护装置中，（ ）主要用于高架升降机，为防止吊笼下行时不停机，压迫缓冲装置造成事故。 A．超高限位装置 B．超载限位器 C．下极限限位装置 D．断绳保护装置

A.超高限位装置
B.超载限位器
C.下极限限位装置
D.断绳保护装置

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