题目内容
一个软件产品开发完成投入使用后，常常由于各种原因需要对它做适当的变更。在软件的使用过程中，软件原来的 (48) 可能不再适应用户的要求，需要进行变更；软件的工作环境也可能发生变化，最常见的是配合软件工作的 (49) 有变动；还有一种情况是在软件使用过程中发现错误，需要进行修正。通常把软件交付使用后做的变更称为 (50) 。软件投入使用后的另一项工作是 (51) ，针对这类软件实施的软件工程活动，主要是对其重新实现，使其具有更好的 (52) ，包括软件重构、重写文档等。 (51) 和新的软件开发工作的主要差别在于 (53) 。
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In China it is relatively usual to ask people their age, but in the West this question is generally regarded as impolite. This is particularly true (56) women, and even more (57) if the inquirer is a man. However, it is very (58) to ask children their age, and some adults may not mind (59) either. In fact, some elderly people are quite happy to (60) their age, especially if they feel they look young (61) their age. Nevertheless, it is not very wise to ask a(n) (62) question like" How old are you". If elderly people want to talk about their age, and perhaps receive a compliment on how young they look, they may easily (63) the topic themselves, and ask the other person to (64) how old they are. (65) such a question, it is quite acceptable to discuss age (66) . They normally expect to be complimented on their youthfulness, though rather than (67) that they look very old! (68) Westerners do not usually ask people directly how old they are, this does not (69) that they are not interested in knowing how old other people are. They may ask someone else (70) the information, (71) they may try to (72) the topic indirect-ly. Sometimes discussions about educational (73) and the number of years of working ex- periences may provide some (74) , but this is not always the (75) .
Ⅱ型呼吸衰竭可出现（）
停药后血浆药物浓度降低至阈浓度以下时所残存的药理效应称为（）
In China it is relatively usual to ask people their age, but in the West this question is generally regarded as impolite. This is particularly true (56) women, and even more (57) if the inquirer is a man. However, it is very (58) to ask children their age, and some adults may not mind (59) either. In fact, some elderly people are quite happy to (60) their age, especially if they feel they look young (61) their age. Nevertheless, it is not very wise to ask a(n) (62) question like" How old are you". If elderly people want to talk about their age, and perhaps receive a compliment on how young they look, they may easily (63) the topic themselves, and ask the other person to (64) how old they are. (65) such a question, it is quite acceptable to discuss age (66) . They normally expect to be complimented on their youthfulness, though rather than (67) that they look very old! (68) Westerners do not usually ask people directly how old they are, this does not (69) that they are not interested in knowing how old other people are. They may ask someone else (70) the information, (71) they may try to (72) the topic indirect-ly. Sometimes discussions about educational (73) and the number of years of working ex- periences may provide some (74) , but this is not always the (75) .
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