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问题 多项选择题

通用电气公司的战略业务单位划分法中处于“绿色区域”的是（）。

A、业务实力弱

B、业务实力强

C、行业吸引力大

D、行业吸引力小

E、销售量大

答案

参考答案：B, C

选择题
His mother suggested he ____ to see the doctor, because his pale face suggested he ____ ill.
A. would go, had been
B. go, was
C. went, had been
D. must go, was
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问答题 简答题

何谓基波？何谓高次谐波？什么是奇次谐波和偶次谐波？
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