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【单选题】
CH3CH2CH2OCOCH3的名称是A.
甲酸正丁酯
B.
乙酸正丙酯
C.
丙酸乙酯
D.
正丁酸甲酯
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【单选题】The fact has worried many scientists _____ the earth is becoming warmer and warmer these years.
A.
which
B.
that
C.
as
D.
what
【单选题】____________ spring, the weather is getting warmer and warmer. [ ]
A.
In
B.
In the
C.
At
【单选题】Who was Marilyn Monroe?
A.
An American actress and model
B.
A British actress and model
C.
A Russian actress and model
D.
An Australian actress
【单选题】Who was Marilyn Monroe?
A.
An American actress and model
B.
A British actress and model
C.
A Russian actress and model
【单选题】The fact has worried many scientists______ the earth is becoming warmer and warmer these years. [ ]
A.
what
B.
which
C.
that
D.
though
【简答题】The fact has worried the people across the world ___________ the earth is becoming warmer and warmer these years. A．what B．which C．that D．where
【单选题】The fact has worried many scientists ________the earth is becoming warmer and warmer these years.
A.
what
B.
which
C.
that
D.
whose
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