天然气是指化学作用及地质变质作用，在不同地质条件下生成、运移，在一定压力下储集的（）

矫正金属结构件的步骤有哪些？

飞机以恒定的速度沿水平方向飞行，距地面的高度为H=500m，在飞行过程中释放一个炸弹，炸弹着地即刻爆炸，爆炸声向各个方向传播的速度都是v₀=

1

3

km/s，炸弹受到的空气阻力忽略不计．已知从释放炸弹到飞行员听到爆炸声经过的时间t₁=13s．

（1）求炸弹在空中的飞行时间t₂

（2）辨析题：求飞机的飞行速度（vt₁）2+（H）²=[v₀（t₁-t₂）]²为了求解飞机飞行的速度，某同学分析并建立了方程：根据飞机和爆炸声运动的等时性及位移的几何关系，得到你认为该同学解答是否正确？如果正确，请求解出飞机的飞行速度；如果有问题，请指出问题出在哪里？并给出正确的解答．

保险代理合同与保险合同是保险代理职业行为的（ ）依据与基础。

A．道德

B．法律

C．社会

D．经济

MONEY – SAVING TIPS FOR DISNEY WORLD

Every time you visit Disney World, there’s something new to see. What began in 1971 as the Magic Kingdom now includes the high – tech, movie-mad Disney and Animal Kingdom . Each time the park expands（扩大）, so do your chances to spend money. How can you save ? As a family guide to Disney World, I've been to the park more than 25 times with my kids , and I've developed a few money-saving tips for you.

●Buy the Five-Day All-in-One Hopper Pass. Even if you're visiting for fewer days , it's a deal （The pass costs $ 229 for visitors aged 10 and up , $ 183 for kids aged three to nine and is free for kids under age three）. Without the pass , you'll have to pay separately for Pleasure Island and the water parks . A single trip to Blizzard Beach , for example , would cost a family of four $100.

　　●　Dine out at Lunchtime. The prices at some of the nicer restaurants , especially those in Epcot's World Showcase , are much lower at noontime than at any other time. It's wise to make reservations（预定）before you leave home . Call 407-W-DISNEY .

　●　Become a Gold Card Member.  For $ 65 , you can get a Magic Kingdom Club Gold Card （call 1-800-56-DISNEY）. Cardholders get up to 20% off Disney hotel rooms , plus prices on character breakfast , theme park tickets and goods from Disney stores .

　●　Don't Pay Extra to See a Character.  Character-theme dinner shows are expensive , costing a family of four about $ 140 , and even a character breakfast , where Mickey or Donald Duck joins you for cakes , can set you back $ 50. If your budget (预算) is tight, try to meet the characters inside the theme parks and at free in-park shows . You can watch the Diamond Horseshoe show , for example , in the Magic Kingdom for no additional cost , while the similarly themed Hoop-Dee-Doo Musical Revue needs expensive tickets .

　●　Wait Until the End of Your Trip to Buy Souvenirs.  By then , the kids will really know what they want , and you won't waste money on expensive things .

67．If you are short of money, the writer suggests you should not        .

A．buy things for the kids from Disney stores.

B．buy souvenirs at the beginning of the trip

C．make a trip to Blizzard Beach

D．have your meals out at noontime

68．Which of the following can be used in place of “set you back”

A．offer you  B．save you   C．return you D．cost you

69．You should pay more money if you         .

A．have a five – day All – One Hopper Pass while you’re visiting for four days.

B．do not make a reservation for hotel rooms in advance..

C．are not a Magic Kingdom Club Gold Card holder.

D．have lunch at a restaurant in Epcot’s World Showcase

70．In the writer’s opinion, the better way of meeting the Disney cartoon character is        .

A．to have a character breakfast

B．to watch the Diamond Horseshoe show

C．to pay separately for Pleasure Island and the water parks

D．to attend the Hoop – Dee – Doo Musical Revue

高血压患者，生气后，血压升至250/120mmHg，发生癫痫样抽搐，呕吐，意识模糊等中枢神经系统功能障碍的表现，脑CT未见异常，最可能的诊断是（）

A.脑出血

B.高血压脑病

C.蛛网膜下腔出血

D.脑梗死

E.高血压危象