{$mEDiAurl} inDiCAtE whEthEr EACh oF thE Following is mEntionED in thE lECturE As A rEquirEmEnt For mAking mAplE syrup.CliCk in thE CorrECt Box For EACh phrAsE.

	yEs	no
A、wArm DAys AnD ColD nights whEn thE tEmpErAturE Drops BElow FrEEzing．
B、mAplE trEEs thAt grow in DEnsEly ForEstED ArEAs．
C、BlACk mAplEs or sugAr mAplEs thAt proDuCE sAp thAt is ovEr 66% sugAr.
D、A、spACE to Boil sAp until it Forms A sugAry syrup.