单项选择题

A．Students are not required to attend regular class lectures.
B．The professor videotapes class lectures for review.
C．Classes are held at various locations throughout the area.
D．Students receive credit for work experience.
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单项选择题
A．The number of smokers has been falling about 2 percent a year.B．The number of smokers has been rising 20 percent a year.C．The number of smokers has been rising 2 percent a year.D．The number of smokers has been failing 20 percent a year.
A．The number of smokers has been falling about 2 percent a year.
B．The number of smokers has been rising 20 percent a year.
C．The number of smokers has been rising 2 percent a year.
D．The number of smokers has been failing 20 percent a year.
单项选择题
A．It makes a clone from an ordinary, adult cell.B．It makes the first normal and healthy cloned animal.C．It paves the way to the cloning of human beings.D．It makes a cloned animal with only mother.
A．It makes a clone from an ordinary, adult cell.
B．It makes the first normal and healthy cloned animal.
C．It paves the way to the cloning of human beings.
D．It makes a cloned animal with only mother.
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