Which of the following is the name of CuI（）
A. copper （I） iodide
B. cuprous chloride
C. copper （II） iodide
D. cupric iodide
查看答案
“三键”的英语词汇是__（）
A. a triple bond
B. nitrogen fixation
C. a double bond
D. a single bond
“稀硝酸溶液”的英语词汇是______（）
A. a weak solution of nitric acid
B. free oxygen
C. by-product
D. the amount of proteins
Which of the following processes would you classify as chemical reactions（）
A. The burning of paper
B. The formation of rust on iron
C. The boiling of water
D. The preparation of sugar syrup by adding sugar to hot water
E. The manufacture of salt by evaporation of sea water
Which of the following properties can be classified as the physical properties of a substance（）
A. hardness
B. density
C. solubility
D. ductility
E. malleability
F. melting point
G. boiling point
H. crystalline form
I. mass
J:volume
微信支付 
支付宝支付