You are consuming a Windows Communication Foundation （WCF) service in an ASP. NET Web appl

ing used and the average sizes of tables in the various databases.Some details are as follows:The Mysql instance has 400 databases. Each database on an average consists of 25-50 tables. You use the query:SELECT TABLE_SCHEMA, ‘ENGINE‘, COUNT (*), SUM(data_length) total_size FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE= ‘BASE TABLE‘ GROUP BY TABLE_SCHEMA, ‘ENGINE‘ ;Why is this query slow to execute？（）

A.Collecting information requires large numbers of locks on various INFORMATION_SCHEMA tables

B.Aggregating details from various storage engine caches for the final output is time consuming

C.Collecting information requires various disk-level operations and is time consuming

D.Counting and summarizing all table pages in the InnoDB shared tablespace is time consuming

A Windows Communication Foundation (WCF) client application is consuming an RSS syndication feed from a blog.You have a SyndicationFeed variable named feed. The application iterates through the items as follows.(Line numbers are included for reference only.)01 foreach (SyndicationItem item in feed.Items)02 {03 }You need to display the content type and body of every syndication item to the console.Which two lines of code should ou insert between lines 02 and 03？（）

A.

B.

C.

D.

ectivity was enabled for all users. After investigating the traffic flow, you determine that peerto-peer traffic from a music download site is consuming a large amount of bandwidth. Which QoS mechanism can you implement to improve the network response time？（）

A. Use CBWFQ to queue the peer-to-peer traffic into the default traffic class.

B. Use class-based WRED to randomly drop the peer-to-peer traffic during network congestions.

C. Use class-based policing to limit the peer-to-peer traffic rate.

D. Use class-based shaping to delay any excessive peer-to-peer traffic. Answer: C

The only thing you can do is experiment【22】you find a system that does work for you. But two things are sure:【23】else can do your studying for you, and unless you do find a system that works, you won't although college. Meantime, there are a few rules that【24】for everybody. The hint is "don't get【25】".

The problem of studying,【26】enough to start with,【27】the fastest readers have trouble to do that. And if you axe behind in written work that must be【28】, the teacher who accepts it【29】late will probably not give you good credit. Perhaps he may not accept it【30】. Getting behind in one class because you are spending so much time on another is really no solution. Feeling pretty virtuous about the seven hours you spend on chemistry won't【31】one bit if the history teacher pops a quiz. And many freshmen do get into trouble by spending too much time on one class at the【32】of the others, either because they like one class much better or because they find it so much harder that they think they should【33】all their time to it.【34】the reason, going the whole work for one class and neglecting the rest of them is a mistake. If you face this dilemma, begin with the shortest and easiest【35】. Get them out of the way and then go to the more difficult, time consuming work.

(41)

A．good

B．easily

C．sufficiently

D．well

Methods of studying vary; what works 【21】______ for some students doesn't work at all for others. The only thing you can do is experiment 【22】______ you find a system that does work for you. But two things are sure: 【23】______ else can do your studying for you, and unless you do find a system that works, you won't go through college. Meantime, there are a few rules that 【24】______ for everybody. The hint is "don't get 【25】______ ".

The problem of studying, 【26】______ enough to start with, becomes almost 【27】______ when you are trying to do 【28】______ in one weekend. 【29】______ the fastest readers have trouble 【30】______ that. And ff you are behind in written work that must be 【31】______ , the teacher who accepts it 【32】______ late will probably not give you good credit. Perhaps he may not accept it 【33】______ . Getting behind in one class because you are spending so much time on another is really no 【34】______ . Feeling pretty virtuous about the seven hours you spend on chemistry won't 【35】______ one bit if the history teacher pops a quiz. And many freshmen do get into trouble by spending too much time on one class at the 【36】______ of the others, either because they like one class much better or because they find it so much harder that they think, they should 【37】______ all their time to it. 【38】______ the reason, going the whole work for one class and neglecting the rest of them is a mistake, if you face this 【39】______ , begin with the shortest and easiest 【40】______ . Get them out of the way and then go to the more difficult, time consuming work.

【21】

A．good

B．easily

C．sufficiently

D．well

tarts. Today, with modern technology, the opposite is true. An engine operating under road conditions will warm up faster and run more efficiently than the one that is idling. Idling just burns gas (on average, about a gallon an hour).

When you have a full tank of gas, park the car downhill. This will prevent any gas from coming out of the tank. Parking in areas of less or no sunlight helps prevent the gas from steaming that would occur if you parked in the hot sun. Your car will stay cooler, too, and that means less gas consuming work for the air conditioner once the engine is started.

Stay away from wide-track tyres if you want top mileage (汽车耗费1加仑油所行驶的路程) . Narrow-track tyres produce less friction and thus less rolling resistance. The same effect is achieved by adding three to five pounds above recommended pressure to each tyre: while this won't noticeably affect you car's sliding quality, it will increase tyre life and gas mileage.

Check tyre pressure often, especially when the weather turns cold. The difference between winter and summer tyre pressure can be as much as eight pounds. This could cost you two miles per gallon.

The main purpose of the passage is to tell us______.

A．how to drive faster

B．how to drive a car properly

C．how to make a car run smoothly

D．how to make your car consume less gas

A.consume

B.consuming

C.consumed

A.capable

B.consuming

C.effective

D.connected

es.()

A.Committing

B.Contacting

C.Conducting

D.Consuming