单项选择题

It can be inferred from the passage that the mass production of steel caused （）

A．a decline in the railroad industry
B．a revolution in the industrial world
C．an increase in the price of steel
D．a feeling of discontent among steel workers

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单项选择题

According to the passage, the railroad industry preferred steel to iron because steel was （）

A．cheaper and more plentiful
B．lighter and easier to mold
C．cleaner and easier to mine
D．stronger and more durable

单项选择题

Which of the following is not mentioned as being one of Emily Dickinson's eccentricities（）

A．Refusing to eat
B．Wearing only white
C．Avoiding visitors
D．Staying in her room