【多选题】下列哪些症状属于 V B2 缺乏引起的 " 口腔生殖综合症 " ( )
【单选题】The battery-operated slippers are used for _____ in the dark. [ ]
【单选题】Battery packs used in pacemakers are practiclal because they can supply power to a pacemaker for .
【简答题】CA: I mean, those battery packs are incredibly heavy, but you think the math can still work out inteltly -- by combining light body, heavy battery, you can still gain ______efficiency.
【单选题】The battery packs used in electric and hybrid automobiles are one of the largest cost components for manufacturing these cars. As the price of these batteries decline, we expect that the:
A.
supply curve for electric and hybrid autos will shift rightward.
B.
supply curve for electric and hybrid autos will shift leftward.
C.
demand curve for electric and hybrid autos will shift rightward.
D.
demand curve for electric and hybrid autos will shift leftward.
【单选题】Battery-operated slippers are used for _______ and were invented by _______. [ ]
A.
seeing in the dark; Chelsea Lanmon
B.
seeing in the dark; Julie Tompson
C.
scooping really cold ice cream; Jayce Coziar
D.
changing the style of the shoes; Jamic Ellsworth
【判断题】填明现金字样的银行汇票不得背书转让。( )