以下可以设定临时性行政许可的有（）A、国务院部门规章 B、省、自治区、直辖市人民政府规

10÷3的商用循环小数的简便记法表示是______，保留两位小数是______．

Performing better under pressure

What is the most stressful thing in school? It is probably exams．小题1:．       But some students succeed under pressure，while others struggle．So，why do some students perform better under stress?

It all comes down to dopamine （多巴胺）． Dopamine is a chemical in our body that sends signals （信号） in the brain．It has many important roles：affecting memory，attention and how we learn．小题2:．       

Our brains control dopamine in two ways．It either takes out dopamine quickly，or gradually．Exam success can be linked to how fast dopamine goes back to a balance，according to new research from the University of Missouri，reported Yahoo．

小题3:．       If you become stressed，your brain will start to overload （起负荷） on dopamine．It is like a cup overflowing with water．The quicker you are able to go back to a balance of dopamine，the quicker you can concentrate．小题4:．      

Researchers found that，during a test，people who slowly got back to a balance of dopamine scored 8 percent lower． That’s me difference between a good mark and a bad mark．

But don't fear，there is good news for every student．小题5:．    So，it turns out that practice really makes perfect．

根据短文内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使短文意思通顺、内容完整，并在答题卡上将该项涂黑。

A．This will help you perform better on a test．

B．Exams can put us under a lot of pressure．

C．The study also found that the more practice you get，the less stressed you’ll be．

D．What happens when we take an exam?E．Our brains work best when there is a balance of dopamine—not too much or too little．

女性，22岁，月经增多8个月，2周来牙龈出血，下肢皮肤散在出血点与瘀斑，血红蛋白78g/L，白细胞5．0×10⁹/L，临床考虑为特发性血小板减少性紫癜。

首选药物是（）

A.云南白药

B.甲氰咪胍

C.大剂量丙种球蛋白

D.皮质激素

E.长春新碱

生态系统的基本组成部分是( )。

A．生态环境要素

B．植物、动物、微生物及其生存环境要素

C．植物、动物、微生物

D．非生物环境要素、植物、动物

试述脑出血的治疗原则。