2008年3月份玉米合约价格为2.15美元/蒲式耳，5月份合约价格为2.24美元/蒲式耳。交易者预测玉米价格将上涨，3月与5月的期货合约的价差将有可能缩小。交易者买入1手(1手为5000蒲式耳)3月份玉米合约的同时卖出1手5月份玉米合约。到了12月1日，3月和5月的玉米期货价格分别上涨至2.23美元/蒲式耳和2.29美元/蒲式耳。若交易者将两种期货合约平仓，则交易盈亏状况为（）美元。

What do we learn about Thomas Jefferson？

A．His political view changed his attitude towards slavery.

B．His status as a father made him free the child slaves.

C．His attitude towards slavery was complex.

D．His affair with a slave stained his prestige.

What do we learn about Thomas Jefferson？

A．His political view changed his attitude towards slavery.

B．His status as a father made him free the child slaves.

C．His attitude towards slavery was complex.

D．His affair with a slave stained his prestige.

What do we learn about Thomas Jefferson？

A．His political view changed his attitude towards slavery.

B．His status as a father made him free the child slaves.

C．His attitude towards slavery was complex.

D．His affair with a slave stained his prestige.

What do we learn about Thomas Jefferson？

A．His political view changed his attitude towards slavery.

B．His status as a father made him free the child slaves.

C．His attitude towards slavery was complex.

D．His affair with a slave stained his prestige.

What do we learn about Thomas Jefferson？

A．His political view changed his attitude towards slavery.

B．His status as a father made him free the child slaves.

C．His attitude towards slavery was complex.

D．His affair with a slave stained his prestige.

What do we learn about Thomas Jefferson？

[A] His political view changed his attitude towards slavery.

[B] His status as a father made him free the child slaves.

[C] His attitude towards slavery was complex.

[D] His affair with a slave stained his prestige.

To what ______ do Thomas Jefferson and Abraham Lincoln belong？

A．category

B．way

C．order

D．strategy

What do we learn about Mark Davies？

A．His dotcom firm had dominated the British market.

B．He was the person who benefited most from the African market.

C．He had been tired of the fierce competition among British dotcom firms.

D．He created and founded the firm TradeNet all by himself.

What do we know about his friend？

A．His friend died.

B．His friend was well.

C．His friend was beer.