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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
B．错
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问答题
Some people feel that ______.
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...
