Whentheboilerloadreturnstonormal,thedrumpressurewillriseandsteambubbleformationwillreduce,causingafallinwaterlevelThisisknownas().
A. swell
B. shrinkage
C. flashoff
D. lackofwater
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Pleasearrange()asurveyortoinspectthedamagedbulkhead.
A. of
B. for
C. with
D. in
在并联型石英晶体振荡电路中,晶体等效为()。
A. 电感
B. 电容
C. 电阻近似为零
Sometimesitisdesirabletoconnectamemberbothbyrivetingandwelding.WhichstatementisTRUEconcerningthisprocedure?()
A. Tearingthroughthememberismorelikelyinthistypeconnection
B. Theweldmaybebrokenbythestressescausedbyriveting
C. Theweldincreasesthetensilestressontherivetheads
D. Theweldingmustbecompletedbeforetherivetingcommences
登録读音正确的是()
A. とうろく
B. とろく
C. とうろ
D. とうる