从讨袁斗争的结局看，护国运动、二次革命的成败主要取决于(   )

    The first robots were invented in the1920s. Since then robots ____ (appear) in many American films. In some films, they are stronger, faster and cleverer ____ people.

    In real life, robots are ____ (main) used in factories. They do some dangerous and difficult jobs for humans.

    Robots also help disabled(残疾的) people, for example, blind people. Today many blind people have a guide dog ____ (help) them. In the future, guide dogs might be robot dog.

    One kind of robot guide dog has ____ (wheel). It moves in front of the owner. It is very clever. It knows the speed of its owner's walk. The owner ____ (wear) a special belt(带子). This belt sends instructions ____ the owner from the dog, such as "Stop here", "Turn left" or "Turn right".

    In the United States, another kind of robot helps disabled people to take care of ____ (them) in their daily life. The robot hears the sound of its owner's voice. It follows instructions such as "Turn the page" or "Make a cup of coffee".

    Robots are also used in American hospitals. They can do simple jobs. At one hospital, for example, a robot takes meals from the kitchen to patient's rooms. It ____ gets lost because this robot has a map of the hospital in its computer memory.

     ____ robots can help people in many ways, they will never take the place of humans.

    Why doesn't the conductor face the audience?____As the only person with his back to the audience, the conductor is a figure who is bathed in the spotlight, but his complex work requires a high degree of musical skill, as well as an ability to extract what he desires out of the group of artists he leads--his orchestra.

    ____A person may become a conductor without graduating from the conducting department of a music school or studying in any kind of conductor's training program. However, becoming the conductor of a famous orchestra requires a great deal more than what is needed merely to join an orchestra.

    ____These naturally examine a conductor's technique and musical interpretation while he conducts an orchestra through a prepared piece of music, but they also involve a sight-reading element____The conductor then has to sit in a room and memorize the piece before coming out and leading the orchestra through the piece by memory. Not only does the conductor have to make his arm and hand motion properly, and signal all the entrances of each instrument, he has to point out intentional mistakes made by the orchestra members on the spot.

    The least capabilities a conductor must have are: The ability to memorize an entire score. A good ear for distinguishing correct notes among the music of the entire orchestra.____

    Of the conductors that meet these requirements, those with better musical insight and a higher level of charisma(魅力) will succeed.

A. The need for a common musical standard becomes necessary

B. The ability to lead a group of professional musicians

C. There are many conducting competitions

D. For this, the score of music is given to the conductor on site

E. This is how the role of the conductor came to be established

F. The role of the conductor is in fact not well understood

G. There are no examinations for becoming a conductor