不定项选择

多发性硬化在低纬度地区发病率更高。‏

A．正确
B．错误

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单项选择题

单片机的发展趋势中包括高价格。（）

A．对
B．错

Some people feel that ______.
A、 artificial hearts are seldom effective
B、 the country should not spend so much money on artificial hearts
C、 the country is not spending enough money on artificial hearts
D、America's health-care programs are not doing enough for the nation's health

答案： the country should not spend so much money on artificial hea...