第8题: [单项选择]纤溶酶的主要作用不包括（）。 A. 降解纤维蛋白原和纤维蛋白 B. 水解各种凝血因子（V、Ⅶ、Ⅺ、Ⅻ） C. 分解血浆蛋白和补体 D. 将单链t-PA、u-PA转变为双链t-PA、u-PA E. 将赖氨酸PLG转变为谷氨酸PLG 参考答案:E 答案解析:纤溶酶主要作用为：①降解纤维蛋白原和纤维蛋白。②水解各种凝血因子（V、Ⅶ、Ⅺ、Ⅻ）。③分解血浆蛋白和补体。④将单链t-PA、u-PA转变为双链t-PA、u-PA。⑤将谷氨酸PLG转变为赖氨酸PLG。⑥
第32题: [简答题]Write your letter neatly with no less than 100 words on ANSWER SHEET2. Do not sign your own name at the end of the letter; use " Li Ming" instead. You do not need to write the address. 参考答案:
[范文]
Dear Ms. White,
Thanks for your letter about the heating system. We have had a plumber check the system today and we were told that the system was too old and that it had to be replaced. The contractor will send workers to install a new furnace the day after tomorrow. So for today and tomorrow there , will be no heat for the entire building, but please rest assured that the new heating system will work before the cold front arrives this weekend.
We apologize for the Inconvenience. And we value your understanding and cooperation.
Li Ming
Building Supervisor
答案解析:
[审题]
便笺也叫做便条，是一种简便的信函，形式简单，主要用于询问、道歉、请假、约会、留言等事由。与一般书信相比，便笺可以省略以下几项：收信人和发信人的地址；日期中的年份。
