Which of the following materials belongs to compounds?
A.copper
B.Fe2O3
C.steel
D.gasoline
A.copper
B.Fe2O3
C.steel
D.gasoline
第1题
A、copper
B、CO
C、solder焊锡
D、steel
第2题
A.The Wall Street Journal.
B.Evening Post.
C.The Globe and Mail.
D.The Guardian.
第3题
A. read and write
B.save and receive
C.wait and signal
D.P and V
第4题
A.read and write
B.send and receive
C.wait and signal
D.Pand V
第5题
A.The conflict between the coach and team members.
B.Someone's losing his way in the forest.
C.Some criminals' complaint against the world.
D.Someone's not being sure whether to go to college or not.
第6题
A.Piston pump
B.Screw pump
C.Diffuser pump
D.Water-ring pump
第7题
A.Irish.
B.French.
C.Greek.
D.German.
第8题
A、accountant
B、auditor
C、architect
D、bartender
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