对授课内容的表达要语言精练、通俗易懂、表述清楚、归纳概括性强、重点突出。

在航空运输中，一般来说，下列（）货物必须提前预订舱位。

A．服装

B．乳制品

C．机械零件

D．书刊

文件的安全性是指抵抗和预防各种物理性破坏及人为性破坏的能力，保证文件安全性常用的措施是 【7】 。

1785年，一位罗马商人乘坐火车来到慕名已久的第一次工业革命发源地英国，感受到工业革命对人类社会的巨大推动作用。同时对“法兰西人皇帝”——拿破仑的统治赞叹不已。

（1）错误：________________理由：___________________

（2）错误：________________理由：___________________

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

The family’s mood, which had been enthusiastic at the beginning of the trip, sank as the temperature has risen, dramatically, but not enough for calling off the whole trip.（）

A. has risen, dramatically, but not enough for calling

B. has risen, but not dramatically enough to call

C. rose, but not so dramatically as to call

D. rose, but not dramatically enough to call

E. rose, but not dramatically enough for calling