在某食品消化液中加入K2CrO4溶液后有黄色沉淀产生,说明该食品中可能有()。
A.Mn++
B.Mg++
C.Pb++
D.Cu++
参考答案:C
外生殖器中感觉敏锐的部位有()
A.阴阜
B.处女膜
C.小阴唇
D. * * 旁腺
E.阴蒂
The tremendous heat at a star’s core,()tremendous gravity, joins the nuclei of hydrogen atoms.
A. combined with
B. having combined with
C. combining with
D. being combined to