下列可不设置火灾自动报警系统的是（）。 A.700个座位的电影院 B.柴油发电机房

有一列火车长250米，现在过长为750米的桥，那么火车头从开始进入到完全过完桥至少需要（）时间（已知火车速度为54千米/小时）。

A．30秒

B．40秒

C．66.7秒

D．87.5秒

TOKYO - Japan is considering plans to calm tensions（紧张）with China by acknowledging(承认) Chinese claims to the disputed islands in the East China Sea, while maintaining its own position, Kyodo News cited sources as saying on Tuesday.

The report said that the plans would allow Japan, without changing its long-held position, to compromise a little with China, which has called on Tokyo to acknowledge the existence(存在) of a dispute（冲突）over the Chinese Diaoyu Islands, referred to as Senkaku Islands in Japan.

Japan has refused to rescind its recent purchase（购买） in mid-September of three of the five Diaoyu islands from a so-called private Japanese owner, which the government says was meant to maintain（继续）the uninhabited islands in a stable manner, despite China's strong protest.

It remains uncertain, however, whether China would be encouraged by the Japanese step to improve the tensioned ties, said Kyodo.

小题1:The passage may come from___________.

A．a magazine

B．a newspaper

C．a textbook

D．a map小题2:From the passage we can know________.

A．Japan will give in.

B．China is against Japan’s purchase of Diaoyu islands.

C．The problem between China and Japan has been settled.

D．China is the owner of Diaoyu islands.小题3:What does the underlined word mean?

A．agree

B．give up

C．compete

D．change小题4:What is the writer’s attitude?

A．He supports China.

B．He supports Japan.

C．He doesn’t have his own attitude.

D．He dare not show his attitude.

邮电部门对疫情报告按普通邮件传送。（）

现有一管道为，介质体积流量QV＝500m³／h，试计算它的流速v为多少？

正步双脚的动作要领是左脚向正前方踢出，腿要绷直，脚尖下压，脚掌与地面平行，离地面（）厘米，适当用力使全脚掌着地。