发射地球同步卫星时，先将卫星发射至近地圆轨道1，然后经点火，使 其沿椭圆轨道2运行，最后再次点火，将卫星送入同步圆轨道3．轨道 1、2相切于Q点，轨道2、3相切于P 点，如图所示，则当卫星分别在1、2、3轨道上正常运行时，以下说法正确的是（   ）

    Everybody, welcome to ____(we) company. I am Luisa, Director of the department. Let me say something to you all. The starting of work can be exciting on the hand, and can also be ____(worry) on the other. No matter what your future job is, you will have to work with others. Leaning to get on well with others must come first,____ (include) all staff in the company and our ____ (custom).

    And secondly, right after my introduction, spend some time reading the introduction of our company and get to know the people in your office and find out ____ the company is like. This afternoon you can walk around our workshops and know ____ (much) about the products. No one is allowed ____ (leave) the company before 5:30 pm. By the way, lunchtime ____ (come) at 11:50 and it's free ____ charge.

    Remember: Learning is so important ____ it can change your future life.

This is what I'd like to say to you at the moment. If you still have any question, please come to my office. Thank you.

下列实验方案中，能达到目的是（　　）