题目内容

Nanotechnology is the manipulation of matters with at least one dimension sized from _ to ___ nm.

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Becauseof_and______________,nanomaterialshaveuniquepropertiescomparedwiththeirlargercounterparts.

The scientific definition of “1 meter” is: the length of the path travelled by light in vacuum during a time interval of _______________ seconds.

Manyconsumersunscreenproductscontainsnanomaterialstoenhanceitsprotectiveeffects.Thesematerials(e.g.titaniumdioxide(TiO2))donotdegradeeitheronhumanskinorintheenvironment.Thiscausesethical&environmentalconcerns.Buttheproducersnevertelltheconsumersaboutthis.

A. 对
B. 错

InthecaseofsalmonvaccineswithPLGAnanoparticles,thePLGAnanoparticlescanenhancetheimmuneresponseofthesalmonvaccines&thusprotectthefishbetter.Buttheeffectsofthenanoparticlesonthefishmeatquality&safetyareunknown.Theenvironmentaleffectsareunknown.Theconsumersknowthiswhenthefishissold.

A. 对
B. 错