水泥砂浆防水层施工应符合哪些要求

下列词语中，加点宇的读音全部正确的一组是

A．隽永（jùn）煞费苦心（shà）处境（chǔ）参差不齐（chī）

B．眩目（xuàn）扣人心弦（xuán）湍急（cuān）惴惴不安（zhuì）

C．忐忑（tè）截然不同（jié）荤菜（hūn）呱呱坠地（gū）

D．腼腆（diǎn）恬静优美（tián）吮吸（shǔn）瞬息万变（shǔn）

（8分）在学习金属时，老师布置同学们对家中的各种金属进行调查，为了找到更多种类的金属，小涛向父母求助，从爸爸的化验室拿到了金属锰（Mn），从妈妈的首饰盒里找到了纯钯（Pd）戒指与吊坠。课上交流时大家对这两种金属在金属活动性顺序中的位置产生了兴趣。

Mn	Pd

（1）小昕同学仔细观察后提出了初步猜想：

由于有的锰锭上已经覆盖了红褐色的锈，而经过长时间佩戴的钯金戒指还很光亮，所以

         相对活泼一些。

（2）设计并进行实验：

实验目的	实验操作	实验现象
验证两种金属的活动性强弱	（Ⅰ）取少量PdCl2溶液于小烧杯中，用镊子加入一小块金属锰。	有黑色粉末生成，溶液由无色变为浅粉色（MnCl2）。
	（Ⅱ）取相同的稀硫酸于两个小烧杯中，分别放入两种金属。	其中一支烧杯中有气体产生，溶液变为浅粉色，另一个烧杯中无明显现象。

（3）初步结论：猜想成立；实验①（Ⅱ）中发生反应的化学方程式为_________________。

（4）小柱同学进一步设计并进行实验：

实验目的	实验操作	实验现象
②	（Ⅰ）取少量CuSO4溶液于一个小烧杯中，用镊子加入金属      ，一段时间后取出冲洗。	无明显现象。
	（Ⅱ）取少量AgNO3溶液于另一个小烧杯中，用镊子加入金属钯，一段时间后取出冲洗。	无明显现象。
	（Ⅲ）取少量PdCl2溶液于第三个小烧杯中，加入老师提供的Pt丝。	无明显现象。

（5）结论：钯在金属活动性顺序中应该排在     和     之间。

（6）反思：根据上述实验，判断金属活动性强弱的两种方法为            。

（7）应用：根据总结出的方法，完成下列实验方案。（要求采用与（4）中不同的方法）

实验目的	实验操作	实验现象和结论
探究Mn和Zn的金属活动性强弱

SeaWorld San Diego is one of the world's famous marine adventure parks with 200 acres of world-class shows, thrilling rides and unforgettable animal encounters. More than 80 million visitors have explored the mysteries of the sea here.and spent the day checking out all eleven shows including the performance of Shamu the killer whale. In between shows you can enjoy yourself on Shipwreck Rapids. When you find that the excitement has drained your energy you can take a break to watch Shamu close! Summer special SeaWorld San Diego 7-days pass

Adults at Kid's Price! Unlimited admission to SeaWorld San Diego for up to 7 consecutive(连续的)days from date of first use.(available through September 30, 2010)

Adult (ages 13+) Gate Price $69.00 Your Price$56.50

Child (ages 3-12) Gate Price $59.00 Your Price $56.50

7-Day Pass FREE BONUS: SeaWorld San Diego

The Go San Diego Card is your ticket to the best San Diego has to offer. For one price you can enter over 55 attractions – including the San Diego Zoo, The U.S.S. Midway, Legoland, Whale Watching Excursions, and much more. The Go Card is the only ticket you need, saving you up to 55% compared to buying individual admissions. Plus, enjoy VIP access to some of San Diego's top attractions.（available April 1, 2010 – March 31, 2011）

Adult (ages 13+) Gate Price $284.00 

Child (ages 3-12) Gate Price $210.00

Child’s Ticket for Only $5.00

For nearly 50 years, SeaWorld Parks & Entertainment has been rescuing and rehabilitating animals in need. We also work to support conservation efforts around the world. It’s our passion and our duty. We would like to invite you to be a part of it.

Now through December 31, 2010, when U.S. residents purchase a full-price adult admission, children ages 3-12 receive a ticket to SeaWorld for only $5.00. (Limit of one $5.00 SeaWorld Cares child ticket with each adult ticket purchased - up to a maximum of 6 child tickets). If you require more child tickets, you'll need to purchase these from the 7-day child ticket listed above. 100% of the proceeds will be donated by SeaWorld to the SeaWorld/Busch Gardens Conservation Fund.

Adult (ages 13+) Gate Price $69.00 Your Price$69. 

Child (ages 3-12) Gate Price $59.00 Your Price $5

小题1: The purpose of the passage is ___________.

A．to describe the beauty of SeaWorld San Diego

B．to draw more visitors in the summer of 2010

C．to tell of the most exciting activities

D．to introduce various tickets for children小题2: If your couple and your child（age 11）take a tour during Summer special SeaWorld San Diego, _______.

A．you’ll have to pay more than $179.50

B．you can visit the park any day you like during the season

C．you can start your visit any day before September 30, 2010

D．you have only to pay no more than $184.50小题3: In almost half a century, by SeaWorld Parks & Entertainment ____________.

A．many more animals have been bought

B．many more animals have been treated and cured

C．natural resources have been protected

D．more Americans are called on to join in the activity小题4: From the last paragraph we can learn that _________.

A．you can receive a ticket to SeaWorld for only $5.00

B．an adult ticket can be followed at most 6 child tickets

C．a foreign child can get a ticket to SeaWorld for only $5.00

D．only American citizen can get a free child tickets

通过减少损失发生的机会，降低损失发生的严重性来对付风险的措施是______

A．完全回避风险
B．风险损失的控制
C．转移风险
D．自留风险

电动机的额定转速是指电机（）时的转速。

A.满载

B.空载

C.半载