单项选择题

The expression "tip service" ( Line 3, Paragraph 3) most probably means.

A．advisory.
B．compensation.
C．interaction.
D．reminder.
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单项选择题
Which of the following is NOT mentioned about recombinant DNA technology
A．It can bring about rapid and radical genetic changes in life forms.
B．It can be used to restructure DNA molecules to produce new desired plant and animal breeds.
C．It may increase the risk of producing some unexpected diseases.
D．It proves an effective way to cure cancer and other incurable diseases.
单项选择题
The best title for this passage is ________.
A．The Basic Function of Genetic Engineering
B．New Applications of Genetic Engineering
C．Recombinant DNA Technology, a New Process in Genetic Engineering
D．The Promises & Dangers of Technological Development
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