地沟油中含有杂质及有毒物质,很多人猜想它的密度应该比正常食用油的密度大,为了验证这种猜想,小华同学找到质量为0.46kg的地沟油,测出其体积为0.5L,该地沟油的密度为多少?请问能否用密度这一指标来鉴别地沟油?(已知正常食用油的密度约为0.91×103kg/m3~0.93×103kg/m3)
① ____ A. whale B. wheat C. where
② ____ A. which B. whom C. when
③ ____ A. what B. who C. well
④ ____ A. why B. when C. where
⑤____ A. wait B. weather C. well
settle, gather, balance, die out, application, affect, spot, turn up, take chances, fundamental