钴铬合金焊接的常用焊媒是（） A.硼砂+硼酸 B.硼砂+氟化物 C.磷酸锌液 D.氟

More than 200 activities have been held so far during the Chinese Language Year in Russia. It has not only made Chinese culture popular in Russia, but also improved understanding and friendship between Russians and Chinese people. More and more Russians begin to enjoy Chinese food and operas, watch TV programs to learn Chinese, and travel in China.

Since the Chinese Language Year program in Russia started, so many events such as movie weeks, operas, Chinese language classes, language contests(比赛) and teaching programs have been popular in Russia.

Through the activities, Russian people have had a chance to learn more about the Chinese culture. Literature, history and its life today. For example, the first group of 500 Russian students visited the Chinese cities of Beijing, Dalian and Qingdao. There they painted both countries’ landmarks(界标), including the Tian’anmen Square, the Great Wall, the Kremlin( 克里姆林宫’), the Volga River and the Red Square. When the Russian students returned, they took part in a photo contest and a writing contest to show their love for China.

And Russians, especially young people, have become more and more interested in learning Chinese. To date, more than 130 universities in Russia are offering Chinese courses.  More than 20 middle and primary schools have also taught Chinese as their first foreign language.

小题1:____ activities were held in the Chinese Language Year in Russia.

小题2:So many events ___ in Russia since the program started.

小题3:What have Russian people learnt from the activities?

小题4:How did the Russian students show their love for China when they came back?

小题5:How many schools are having Chinese courses in Russia?

距离某空压机站10m处声级为80dB（A），距离空压机站150m、180m、300m、500m各有一村庄。该空压机站应布置在距离村庄（）m外，可满足GB3096-2008中2类区标准要求。

A.150

B.180

C.300

D.500

小李在一个通电螺线管插入软铁棒做成电磁铁，用它吸引掉在地上的铁钉时，发现电磁铁不能吸起较大的铁钉。如果要增大电磁铁的吸引力，可采用的办法是：

（1）_____________________________。

（2）_____________________________。

2013年5月31日至6月2日，一年一度的亚洲安全会议暨香格里拉对话会在新加坡举行。

材料一 美国防长哈格尔6月1日发表演讲时重申，美国将继续“亚太再平衡”战略，美国将采取更多“看得见的”行动实现战略重心的转移。美国将在亚太地区投入更多空中、地面力量以及高科技武器，以落实在本地区的“战略再平衡”部署。哈格尔说，此举是为了保障美国及其盟国利益。

材料二 出席对话会的中国人民解放军副总参谋长戚建国6月２日在第１２届香格里拉对话会上发表题为《携手应对风险挑战　实现亚太共同发展》主旨演讲时说，中国将坚定不移走和平发展道路，致力于促进和平的发展、开放的发展、合作的发展、共赢的发展。

（1）请运用“国际社会”有关知识，结合材料一，对美国继续“亚太再平衡”战略进行点评。（6分）

（2）结合材料二，运用“中国走和平发展道路”的有关知识，阐述中国走和平发展道路的必要性和夯实走和平发展道路基础的重要性。(8分）

患者女性，25岁，2周来发热，四肢关节酸痛，无皮疹。胸透示：两侧少量胸腔积液，查体：T39℃，P120次/分。双手掌指关节及膝关节轻度肿胀，血常规示：Hb100g/L，WBC3×10⁹/L，PLT5×10⁹/L，尿常规蛋白1g/L。

下列系统性红斑狼疮的临床表现中，错误的是

A．长期低、中度发热
B．盘状红斑是最具特征性的皮肤改变
C．大多数患者有不对称的多关节痛
D．心力衰竭是SLE患者死亡的常见原因
E．约30%患者可有消化道症状