Fusesplacedinserieswithathermaltrip-typecircuitbreakerareusedfor().
A. time-delayprotection
B. short-circuitprotection
C. shortdurationsurgeprotection
D. sustainedoverloadprotection
查看答案
TheShipowner()thattheshipshallproceedonthevoyagewithreasonabledespatch.
A. contains
B. occurs
C. encounters
D. undertakes
TheShipownercan,however,exempthimselffromliabilityfor(),butifhewishestodoso,hemustuseclearandunambiguouslanguage.
A. seaworthy
B. seaworthiness
C. unseaworthy
D. unseaworthiness
关于《庄子》的说法,下列哪一项是不正确的?()
A. 庄子,名周,宋国蒙人
B. 此书是庄周和他的门徒以及后学著述的总集
C. 此书现存三十三篇,分为内篇和外篇两个部分
D. 鲁迅评价说“汪洋辟阖,仪态万方”
Sincefuseelementsaremadeofzincoranyalloyoftinandlead,themeltingpointofthefuseelementmustbe().
A. higherthanthatofcopper
B. lowerthanthatofcopper
C. equaltothatofcopper
D. reachedwhentheconductoritisprotectingbecomes"whitehot"