【单选题】The graphite shape in ( ) is vermicular.
【单选题】The graphite shape in ( ) is lamellar.
【多选题】由乙烯推测丙烯(CH 2 =CHCH 3 )的结构或性质正确的是 [ ]
【单选题】丙烯可看作是乙烯分子中的一个氢原子被 —CH 3 取代的产物,由乙烯推测丙烯 (CH 2 = =CHCH 3 ) 的结构或性质,正确的是 ( )
【单选题】人生得意须尽欢,莫使金樽空对月。天生我材必有用,千金散尽还复来。出自( )
【单选题】Graphite is a form of carbon.Why can graphite be used as a lubricant?
A.
Graphite contains delocalised electrons which move throughout the structure.
B.
Graphite contains weak covalent bonds so the atoms move easily.
C.
Graphite has a low melting point so it easily turns into a liquid.
D.
Graphite has weak forces of attraction between layers so they can move.
【单选题】The graphite shape in ( ) is spheroidal.
【单选题】由乙烯推测丙烯(CH 2 =CHCH 3 )的结构或性质正确的是 [ ]
【单选题】The graphite shape in ( ) is floccular.
【多选题】The grey pig iron usually includes ( ) according to the shape of graphite precipitation.