男性，40岁，喘息发作5小时入院，为鉴别是否为上气道梗阻最为简便的方法是（） A.拍

一动点P从数轴上表示﹣2的点A₁开始移动，第一次先向左移动1个单位，再向右移动2个单位到达点A₂；第二次从点A₂向左移动3个单位，再向右移动4个单位到达点A₃；第三次从点A3向左移动5个单位，再向右移动6个单位到达点A₄，…，点P按此规律移动，那么：

（1）第一次移动后这个点P在数轴上表示的数是 （    ）；

（2）第二次移动后这个点P在数轴上表示的数是 （    ）；

（3）第五次移动后这个点P在数轴上表示的数是 （    ）；

（4）这个点P移动到点A_n时，点A_n在数轴上表示的数是 （    ）。

Forest guards in western India are using cell phones with ringtones of cows mooing, goats bleating and roosters crowing to attract leopards that have wandered into human settlements, officials said on Monday.

The wild cats in the state of Gujarat often get into villages near forests in search of food, say officials, adding that this results in attacks on people. But rather than use methods such as live bait(诱惑物) like goats tied to trees to lure the leopards, which then fall into large pits dug by guards, officials say they have found a safer method to trap the cats.

“The moos of a cow, bleating of a goat from the phone has proved effective to trap leopards,” said D. Vasani, a senior forest official in Gujarat. “This trick works.” Vasani said forest guards have downloaded the sounds of over a dozen animals as ringtones on their mobiles which they attach to speakers and fix behind a cage. They then play the ringtone continuously for up to two hours until the curious leopard appears and moves into the cage looking for its easy meal.

At least five leopards have so far been lured from villages since the new ringtone method was introduced three months ago. The cats have all been released back into forest areas.

Wildlife activists welcomed the new initiative saying that previous methods of trapping the cats using pits often resulted in the animals getting injured.

小题1:What can be the best title of the passage?

A．Cell Phones to Hunt Animals

B．Practical Uses of Cell Phones

C．Wildlife and New Technology

D．Phone Ringtones to Catch Leopards小题2:Forest guards in India try to catch leopards mainly because ______.

A．leopards attack villagers

B．they want leopard fur

C．leopards attack animals

D．they have new ringtones小题3:What will be needed to trap the leopards using the new method?

① cell phones   ②animals    ③ sounds of animals   ④ cages    ⑤large pits

A．①②③④

B．①③④

C．①④⑤

D．②③⑤

已知地面附近高度每升高12m，大气压降低1mmHg．为了观测大气压这一微小变化，某实验小组巧妙地设计了如图所示的一个实验，在一个密闭的玻璃瓶的塞子上插入一根两端开口且足够长的细玻璃管，瓶内有一定量的水和空气．由于内外压强差，细玻璃管内水面a上升到一定的高度．将玻璃瓶放置在地面上，记录下此时管内水面a的位置，再将玻璃瓶放到离地1.2米的讲台上时，则玻璃管内水面将上升______mm；同时小组成员想用此装置来测量高度．先将此装置放在温度为27℃、大气压为750mmHg的实验室前场地上，测得水柱的高度h=204mm．然后将装置缓慢地平移到二楼的实验室桌面上，待稳定后发现水柱升高了40.8mm，已知实验室比楼下场地的温度高1℃，实验室桌面与外场地的高度差为______m；（不计水面升降引起的瓶内空气体积的变化，水银的密度为13.6×10³Kg/m³）

生产安全管理的核心是（）

A、预知施工中的危险和风险

B、保证不出现伤亡事故

C、消除施工中的危险和风险

D、安全第一，预防为主

E、保证工期按时完成

用右手定则判断感应电动势的方向时，以下（）是错误的。

A.使手心迎着磁力线的方向

B.使四根手指指向磁力线的方向

C.使大拇指指向磁力线的方向

D.使四根手指指向导体的运动方向