雄黄入丸散，成人每次用量为 A．O.5～1g B．0.15～0.3g C．0.001

应用剩余法评估宗地价格，首先需要调查确认的是( )。

A．该宗土地规划许可的用途

B．该宗土地规划的容积率和建筑密度

C．该宗土地开发周期

D．该宗土地开发完成后房地产可能的售价

马克思主义哲学的研究对象是具体科学研究的具体方法。

书面表达。

     阅读下面一封来自于the Changchun Times的求助信，按照要求完成写作任务。

                             How can I have a more meaningful vacation?

Dear editor,

     I'm a Senior Two boy. We used to have extra classes in both summer and winter

vacation. However, we don't have to go to school this winter vacation. Though delighted,

I am confused how to have a more meaningful vacation. What should I do?

                                                                                                                 Yours,

                                                                                                                 Tom

【写作内容】

     假如你是李华，你很想帮助他，请你写一封回信给他，提出适当的建议，要点如下：

     1. 选几本有意义的书，开阔眼界；

     2. 进行体育锻炼，增强体质；

     3. ……

注意：

     1. 适当添加内容；

     2. 信的开头结尾已给出，不计人总词数；

     3. 字数120左右。

Dear Tom,

     I'm Li Hua from a high school as well. _________________________________________

____________________________________________________________________________

____________________________________________________________________________

     May you have a meaningful vacation.

                                                                                                                          Yours,

                                                                                                                          Li Hua

发射窗口是指发射导弹或航天器时，事先总要选择几个较好的发射时段，这几个发射时段就是发射窗口，分为日计发射窗口、月计发射窗口和年计发射窗口。航天器的最终发射时间则总是由（）确定的。

A.日计发射窗口

B.月计发射窗口

C.年计发射窗口

当DG1025型锅炉发生爆管事故时，应如何处理？