单项选择题

It may be inferred from the passage that ______.

A．bacteria can be most easily killed by removal of moisture
B．drying out a house will eliminate the risk of airborne infection
C．hot-Mr heating is better than steam heating because steam heating uses water
D．none of the above

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单项选择题

Tuberculosis is highly infectious because ______.

A．spores are resistant to drying
B．the causative organism is encapsulated
C．droplets of sputum remain infective for a long time due to the resistance of the organisms to drying
D．none of these

单项选择题

The word tycoon in the last paragraph is ______.

A．derived from a Japanese word, meaning a businessman with great wealth and power
B．an English translation of a Russian word, meaning a man of great consequence
C．borrowed from Portuguese, meaning an industrialist with a great man of money obtained illegally
D．rarely used now because of its derogatory meaning