For the circuit shown, the current that passes through the 6Ω resistor is 2A . The current that passes through the 3Ω resistor is 4A . What is the current that passes through R 1 ？

s interface detail command and notice that for some interfaces you have a circuit type of 3. Which IS-IS level(s) is enabled on these interfaces？（）

A. Level 1 only

B. Level 2 only

C. Level 1 and Level 2

D. Level 3 only

he serial 0/0 interface of TESTKING2. A leased line point to point circuit is installed between these two routers. The output from the "show interface serial 0/0" command is displayed below for each of these routers:From your observations of the above exhibit, what is the underlying cause of the problem？（）

A. The loopback is not set.

B. The serial cable is faulty.

C. The subnet mask is not configured properly.

D. The IP address is not configured properly.

E. The Layer 2 frame types are not compatible.

F. The keepalive setting is not configured properly.

on daytime television. And anyone who watches them regularly knows that each one varies in style. and format. But no two shows are more profoundly opposite in content, while at the same time standing out above the rest, than the Jerry Springer and the Oprah, Winfrey show.

Jerry Springer could easily be considered the king of "trash talk". The topics on his show are as shocking as shocking can be. For example, the show takes the ever-common talk show themes of love, sex, cheating, guilt, hate, conflict and morality to a different level. Clearly, the Jerry Springer show is a display and exploitation of society's moral catastrophe, yet people are willing to eat up the intriguing predicaments of other people's lives.

Like Jerry Springer, Oprah Winfrey takes TV talk show to its extreme, but Oprah goes in the opposite direction. The show focuses on the improvement of society and an individual's quality of life. Topics range from teaching your children responsibility, managing your work week, to getting to know your neighbors.

Compared with Oprah, the Jerry Springer show looks like poisonous waste being dumped on society. Jerry ends ever with a "final word". He makes a small speech that sums up the entire moral of the show. Hopefully, this is the part where most people will learn something very valuable.

Clean as it is, the Oprah show is not for everyone. The show's main target audiences are middle-class Americans. Most of these people have the time, money, and stability to deal with life's tougher problems. Jerry Springer, on the other hand, has more of an association with the young adults of society. These are 18-to 20-year olds whose main troubles in life involve love relationship, sex, money and peers. They are the ones who see some value and lessons to be learned underneath the show's exploitation.

While the two shows are as different as night and day, both have ruled the talk show circuit for many years now. Each one caters to a different audience while both have a strong following from large groups of fans. Ironically, both could also be considered pioneers in the talk Show world.

Compared with other TV talk shows, both the Jerry Springer and the Oprah Winfrey shows are

A．more family-oriented.

B．relatively formal.

C．more profound.

D．unusually popular.

Voltage will always lead current in a/an _____.

A.capacitive circuit

B.inductive circuit

C.magnetic circuit

D.resistive circuit

A circuit breaker and a fuse have a basic similarity in that they both______.

A.can be reset to energize the circuit

B.should open the circuit when overloaded

C.will burn out when an over current flow develops

D.should short the circuit when overloaded

A.sequence

B.line

C.board

D.circuit

Current measuring instruments must always be connected in ______.

A.series with a circuit

B.parallel with a circuit

C.series-parallel with a circuit

D.delta with the shunt

A circuit breaker differs from a fuse in that a circuit breaker ______.

A.melts and must be replaced

B.is enclosed in a tube of insulating material with metal ferrules(环) at each end

C.gives no visual indication of having opened the circuit

D.trips to break the circuit and may be reset

A.microprocessor

B.transistor

C.chip

D.circuit

A.车体

B.车辆

C.照明

D.电路，线路