单项选择题

According to the passage, why are profit opportunities rare

A．Few people can get a hot tip in the market.
B．Few people have quicker insights than others.
C．Few people are searching such opportunities.
D．Such opportunities are quickly eliminate

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单项选择题

In the process of cloning, what ultimately activates the cell to start dividing

A．An adult cell inserted into an egg.
B．An electronic stimulation.
C．An artificially fertilised egg.
D．Another donor cell.

单项选择题

Professor Larry Goldstein may agree on all of the following statements EXCEPT______.

A．we need to make good use of cloning
B．we need to incorporate cloning into the biological revolution
C．cloning is not intrinsically good or had
D．the ability to clone can offer us exclusively good stuff