which elements belong to micro-elements？（ ）
A: iron
B: sodium
C: zinc
D: magnesium
A: iron
B: sodium
C: zinc
D: magnesium
举一反三
- which elements belong to micro-elements?
- Which of the following elements is a d-block element? A: Copper B: Chlorine C: Aluminum D: Sodium
- Which of the following choice does not belong to the main elements in communication process?
- Which of the following does not belong to the dental elements? A: dentine B: enamel C: cement D: dental pulp
- Which of the following elements are not the five elements? A: Ice B: Wood C: Metal D: Electrisity