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3.A mark or signature placed on a piece of mail to indicate the right to send it free of charge.
7.The children were in beds beneath sheets, the father hanging by a rope from a banister.
9.The mechanical property, light transmittance of ion exchange strengthened solar cell cover glass and the effect of ion beam bombardment on its properties are investigated by dynamic mechanical analyser (DMA), microscope, SEM, UV/visible spectrophotometer and micro hardness instrument respectively.
10.Either of two edible North American sunfishes, the black crappie(Pomoxis nigromaculatus) or the white crappie(P. annularis).

