Withreferencetoaradialpistonpump,whichoneofthefollowingstatementsisfalse?（）
A. Surroundingthefixedshaftisahollowshaft
B. Thishollowshaftcarriesradialbores
C. Eachboreisfittedwithawell-lappedplunger
D. Therearealwaysevennumbersofbores
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对需要续保的代理业务，在保险单到期前（）个月，农信社可协助保险公司通知投保人或被保险人办理续保手续。
A. 1
B. 2
C. 3
D. 4
InspectionofaHalonextinguisherinvolvescheckingthehose，handle，nozzle，and（）.
A. sightglass
B. weighingtheextinguisher
C. servicetechniciansreport
D. lastdateitwascharged
OfficialproofofanAmericanvessel’snationalityiscontainedinthe（）.
A. CertificateofInspection
B. OfficialLog
CertificateofDocumentation
D. ShippingArticles
Withreferencetoarotaryvanesteeringgearsystem,whichoneofthefollowingstatementsistrue?（）
A. Thethreemovingvanesandthethreefixedvanesformthreepressurechambers
B. Thethreemovingvanesandthethreefixedvanesformsixpressurechambers
C. Thethreemovingvanesandthethreefixedvanesformninepressurechambers
D. Thethreemovingvanesandthethreefixedvanesformtwelvepressurechambers
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