短文改错

增加：在缺词处加一个漏词符号（∧），并在此符号下面写出该加的词。

删除：把多余的词用斜线（\ ）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：

1. 每处错误及其修改均仅限一词；

2. 只允许修改10 处，多者（从第11 处起）不计分。

      Last weekend, I traveled by the air for the first time in my life. I usual travel by train,

which is both cheaper and safe. But to fly in the sky was something new to me. At the end,

I felt a little nervous. But very soon I became exciting when I found me high up in the sky

among the clouds. I also found that mountains, fields and river were interestingly small. I

enjoy the frightening and comfortable journey very much. After all, it is more interesting take

a plane than to take a train.

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飞机的正压释压活门为（）.

A.气控气动式

B.液压传动式

C.电动式

D.电磁式