Hemingway was one of the famous writers. He was born in America in 1889. His father was a doctor and loved sports very much, and his mother taught music .Among the six children in the family, Hemingway was the second oldest.
Hemingway had written many books in his life. The old man and the sea is one of the most famous and also my favourite . It came out in 1952 .The main c haracter in the book is a fisherman. He is an old man and fishes alone. People think he is a man with bad luck , becau se he does not get a fish in eighty-four days .Every evening ,he comes home with his empty boat .But the old man believes himself . Then on the eighty-fifth day the man takes a big fish. Although he meets a lot of trouble, the old man never gives up.
选择正确答案，
小题1:Hemingway’s father was a fan of __________.
A．books
B．sports
C． music
D．art小题2:The old man and the sea was published in __________.
A．1852
B．1899
C． 1952
D．1989小题3:The old man does not get a fish until the _______day.
A．fifteenth
B．eightieth
C．eighty-fourth
D．eighty—fifth小题4:What does the old man do when he can not get a fish?
A．He has to look for food somewhere.
B．He does not give up fishing.
C．He does not fish any more.
D．He has nothing to do .小题5:What can we learn from the old man ?
A．When we in trouble , we should not give up.
B．When we want to fish , we can get a big fish .
C．We can do everything well because we are young .
D．We can live a better life if we like fishing .
C2H4+4H2O．若用24g H2转化CO2，则理论上能生成C2H4的质量为多少克？
C2H4+4H2O
解得X=56g，