单项选择题

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A.They carried passengers, but not cargo.
B.They were large, but surprisingly fast.
C.They were the first successful steam-powered ships.
D.They were more reliable than other ships of the 1860’s.
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单项选择题
A.Brett won’t try to get revenge.B.Brett won’t be angry anymore.C.Brett will not always be so busy.D.Brett will have forgotten the woman’s words.
A.Brett won’t try to get revenge.
B.Brett won’t be angry anymore.
C.Brett will not always be so busy.
D.Brett will have forgotten the woman’s words.
单项选择题
A.It influences the surface temperature of Mars.B.It protects living beings from harmful rays.C.It keeps a planet from overheating.D.It is the main component of the air people breathe.
A.It influences the surface temperature of Mars.
B.It protects living beings from harmful rays.
C.It keeps a planet from overheating.
D.It is the main component of the air people breathe.
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