题目

These days the government has issued several economic policies that will ________prosperity of manufacturing industry.   A．accumulate    B．Accomplish    C．access      D．Accelerate 答案：D为了鉴别某白色纺织品的成分是蚕丝还是人造丝，通常选用的法是A.滴加浓硝酸B.滴加浓硫酸C.滴加酒精D.在火焰上灼烧