Silica gel is belongs to ___ adsorbent. A: non-polar B: polar C: semi-chemical D: alkaline E: chemical
Silica gel is belongs to ___ adsorbent. A: non-polar B: polar C: semi-chemical D: alkaline E: chemical
semi A: /ˈsemi/ B: /ˈsɛmaɪ/()
semi A: /ˈsemi/ B: /ˈsɛmaɪ/()
中国大学MOOC: semi A. /ˈsemi/ B. /ˈsɛmaɪ/ ( )
中国大学MOOC: semi A. /ˈsemi/ B. /ˈsɛmaɪ/ ( )
/ʃ/, /j/, /w/ are semi vowels.( )
/ʃ/, /j/, /w/ are semi vowels.( )
请问:鞋业英文中的"SEMI"是什么意思?
请问:鞋业英文中的"SEMI"是什么意思?
chemical
chemical
A chemical is any aspect of a substance which is only seen by means of a chemical reaction (反应).
A chemical is any aspect of a substance which is only seen by means of a chemical reaction (反应).
A chemical compound that contains two atoms of oxygen and one atom of another chemical element is called ______
A chemical compound that contains two atoms of oxygen and one atom of another chemical element is called ______
中国大学MOOC: Which of the following complimentary closes can be used for a formal and semi formal occasion?
中国大学MOOC: Which of the following complimentary closes can be used for a formal and semi formal occasion?
To identify a substance, chemists observe two distinct types of , physical and chemical, which are related to physical and chemical that matters undergoes.
To identify a substance, chemists observe two distinct types of , physical and chemical, which are related to physical and chemical that matters undergoes.