题目内容
【题目】书面表达(满分25分)
假定你是李华,你的朋友李明写信告诉你他因不善于交友而苦恼。请根据以下要点提示给他回信,提出建议。内容要点:
1. 友善、乐于助人;
2. 多与他人交流;
3. 多参加活动。
注意:
1. 词数100左右;
2. 可以适当发挥,以使行文连贯;
3. 开头和结尾已为你写好,不计入总词数。
参考词汇:communicate v. 交流 activity n. 活动
Dear Li Ming,
I’m sorry to hear that you’re feeling worried for failing to make friends. Some tips below may be helpful to you.
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Yours sincerely,
Li Hua
【答案】
【参考范文】
Dear Li Ming,
I’m sorry to hear that you’re feeling worried for failing to make friends. Some tips below may be helpful to you.
First, be kind, friendly and polite to others and ready to help others, through which you’ll get well paid back. Second, try to communicate with others more, for it helps strengthen your ties with friends. Third, take an active part in activities, such as sports, games, travels and parties. In this way, you’ll get more chances to communicate with others. Besides, it’s also very important that friends should be faithful to each other.
Anyhow, there’re many ways to develop a good friendship. Hope you’ll get along well with your friends.
Yours sincerely,
Li Hua
【解析】略
【题目】为了进一步增强洗衣粉对血渍、奶渍、油污、土豆泥等衣物上常见污垢的去除能力,洗衣粉中常常会添加各种酶类。请回答有关问题:
(1)根据衣物上常见的污垢,加酶洗衣粉中添加的酶类有碱性蛋白酶、 、 和 等四类。
(2)碱性蛋白酶能将血渍、奶渍等含有的大分子蛋白质水解成可溶性的 。
(3)下图为加酶洗衣粉的包装袋上的产品说明,根据你所学习的有关知识,解释注意事项③的原因 。
注意事项 |
①请将本品置于阴凉、干燥处,避热、避湿、避光。 ②不慎溅入眼中,立即用水冲洗。 ③水温以30~50℃为宜,切忌用70℃以上的热水。 |
(4)下面是添加脂肪酶的加酶洗衣粉和普通洗衣粉洗涤效果的有关探究实验,请据表回答:
组别 | 洗涤物(等量) | 洗涤温度 | 洗衣粉(等量) | 水量 | 洗净所需时间 |
1 | 油污布 | 45℃ | 加酶 | 2L | 4 min |
2 | 油污布 | 45℃ | 普通 | 2L | 7 min |
3 | 油污布 | 5℃ | 加酶 | 2L | 9 min |
4 | 油污布 | 5℃ | 普通 | 2L | 8 min |
①该实验设计体现了 原则。
②若1号实验组洗净所需时间接近7分钟,请分析最可能的原因 。
(5)添加蛋白酶的加酶洗衣粉不适宜洗涤下列哪些衣料 。
①棉织品
②毛织品
③腈纶织品
④蚕丝织品
⑤涤纶织品
⑥锦纶织品