单项选择题

The last paragraph of the passage clearly indicates that .

A．MSR-1 may be brought into practical application in a few years.
B．as a necessary pioneer in medical science, MSR- 1 has still a long way to go .
C．the basic mechanical components of MSR- 1 are being tested for their final assemblage.
D．the commercial applications of MSR- 1 will be expected in a few years.

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我们是否能利用太阳的丰富能源来发电，或至少是用它来做电力或别种动力通常所做的事呢答案是肯定的。

单项选择题

What is the chief advantage of the virtual reality techniques when used in microsurgery

A．The medical students and surgeons can use it to practise simulated surgical operations as if operating on a real patient.
B．Medical students and surgeons can do any operations without considering their consequences.
C．It helps to do operations on human eyes extremely accurately.
D．It allows surgeons and their students to set their imagination free.