A.Wrong.
B.Right.
第1题:
第2题:
Oneoftheusecasesinyourwebapplicationusesmanysession-scopedattributes.Attheendoftheusecase,youwanttoclearoutthissetofattributesfromthesessionobject.Assumethatthisstaticvariableholdsthissetofattributenames:201.privatestaticfinalSetUSE_CASE_ATTRS;202.static{203.USE_CASE_ATTRS.add("customerOID");204.USE_CASE_ATTRS.add("custMgrBean");205.USE_CASE_ATTRS.add("orderOID");206.USE_CASE_ATTRS.add("orderMgrBean");207.}Whichcodesnippetdeletestheseattributesfromthesessionobject?()
A.session.removeAll(USE_CASE_ATTRS);
B.for(Stringattr:USE_CASE_ATTRS){session.remove(attr);}
C.for(Stringattr:USE_CASE_ATTRS){session.removeAttribute(attr);}
D.for(Stringattr:USE_CASE_ATTRS){session.deleteAttribute(attr);}
E.session.deleteAllAttributes(USE_CASE_ATTRS);
第3题:
lisaiswritingaformulatodeterminethenumberofelementsinalist.shewantstoensurethatavalueisreturned,evenifthevalueherfunctionisevaluatingturnsouttobeanullstring.whichoneofthefollowingcanshesotoaccomplishthis?()
A.useadefauleformulaof1
B.use@elementsandadd1tothetotal
C.usethe@countfunctioninsteadof@elements
D.use@texttotimetoensurethatallstringsarteconvertedtodate-timevalues
第4题:
The bow thruster generally is ineffective at ______.
A.over 3 knots headway
B.at any speed astern
C.at any speed ahead
D.over 1 knot sternway
第5题:
在工资.DBF第4条记录后插入一条空白记录的命令是______。
A.USE 工资 GO4 INSERT BEFORE
B.USE工资 GO4 INSERT BLANK
C.USE工资 SKIP 4 INSERT BEFORE
D.USE工资 SKIP INSERT BEFORE
第6题:
比利时诞生的转Bt基因的烟草,转入的是完整的()基因。
A.cry1A(a)
B.cry2A(b)
C.cry1A(b)
D.cry2A(a)