
活塞组是作往复直线运动的部件总称,它包括()等零件。
A . A、活塞
B . B、活塞环
C . C、活塞销


A . A、活塞
B . B、活塞环
C . C、活塞销
Cloze:Complete the following passage with words chosen from Text A in Unit 4. The initial letter of each is given.
In his commencement address, Jobs tells us three stories from his life. The first story is about c__________ (1) the dots. Here "dots" refers to the many, varied experiences in your life. Jobs wants to stress that you can never know in a__________ (2) what life will become. You can only know the s__________ (3) of your various experiences by looking b__________ (4). Therefore, you must bravely trust your intuition, believing that the p__________ (5) you have chosen will lead you to the life you truly want even when it leads you off the w__________ (6) path.
The second story Jobs tells is about love and loss. You've got to find what you love, and that is as t__________ (7) for work as it is for your lovers. The only way to be truly s__________ (8) with life is to do what you b__________ (9) is great work, and the only way to do great work is to love w__________ (10) you do. If you haven't found it yet, keep looking, and don't s__________ (11). Sometimes the turn of events may be d__________ (12), but don't lose faith. All the losses you have s__________ (13) into may bring about huge benefits later on.
The third story Jobs tells is about death. Needless to say, no one wants to die, yet death is the d__________ (14) we all share. Your time is limited, so don't waste it living someone else's life. Don't be t__________ (15) by dogma. Don't let the noise of others' opinions d__________ (16) out your own inner voice, and always have the courage to follow heart and intuition.