简述21世纪发达国家财政支出的特点。

由于脾虚机体失养，或湿邪内蕴，脾失运化，则面色可见

A．白睛发红
B．两眦赤痛
C．睑缘赤烂
D．全目赤肿
E．两眦红润

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

若一平面简谐波表达式为y=Acos（Bt-cx）（SI），式中A、B、c为正值常数，则（）。

A．波速为c

B．周期为

C．圆频率为

D．波长为

综采工作面质量标准化标准规定梁端距最大尺寸不超过（）。

A、340mm

B、200mm

C、400mm

D、500mm

什么叫型（芯）砂的溃散性？