Which of the following materials belongs to compounds?
A.copper
B.Fe2O3
C.steel
D.gasoline
- · 有3位网友选择 A,占比33.33%
- · 有3位网友选择 B,占比33.33%
- · 有2位网友选择 C,占比22.22%
- · 有1位网友选择 D,占比11.11%
A.copper
B.Fe2O3
C.steel
D.gasoline
A、Curry Crab.
B、Sushi.
C、Pizza.
D、Bibimbap.
A、Scientific American
B、Nature
C、Science
D、Time
A、The Wall Street Journal
B、The Financial Times
C、The New York Times
D、Time
B.Duodenum
C.Kidney
D.Pancreas
E.Stomach
B.Macbeth
C.A Mid-Summer Night’s Dream
D.The Merchant of Venice
E.King Lear
F.As you like it G. Othello
A、carbon steel
B、alloy steel
C、cast iron
D、tool carbon steel
Which is the most stiffest material?
A、A
B、B
C、C
D、none
Which is the most ductile material?
A、A
B、B
C、C
D、none
A、Brinell
B、Rockwell
C、Vickers
D、none of them
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