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根据通带和阻带在频率范围中的相对位置，滤波器分为低通、、带通、带阻四种类型。

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二端口的连接主要有三种方式：、串联和并联。

We’d like to ___ the banquet hall _. It _________ be better if a Christmas tree stands in the middle with some colorful streamers.

A:have… decorate… could;
B:have… decorated… would;
C:have… decorating… will;

We have functions rooms of __________ sizes.

A:various;
B:victory;
C:variety;

Our wedding catering service specializes _________ Asian cuisine including: Chinese, Japanese, Korean, and fusion food.

A:around;
B:on;
C:in;