Theneedlevalveinafuelvalvewill()whenthefuelpressureactionontheneedlevalvetaperedfaceexertsaforcelowerthanthatofthespringcompression.
A. bejammed
B. beopened
C. beseated
D. bebroken
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RCS-921A装置TV断线指示灯,在以下情况下以亮()
A. 发生电压回路断线
B. 控制回路断线
C. 直流电压消失
系统中设定的受托理财赎回规则包括()。
A. “可赎回”
B. “可部分赎回”
C. “不可部分赎回”
D. “不可赎回”
Alatitudelinewillbeobtainedbyobservingabody().
A. ontheprimevertical
B. onthecelestialhorizon
C. atlowertransit
D. ontheGreenwichmeridian
Theoillubricatingdieselenginecylindersusuallycontainadditivesformulatedtoimpartahighdegreeofalkalinityto()theacidconditions.
A. invade
B. provide
C. detergent
D. neutralize