【简答题】A.It warns young people of the hardships of a successful writer. B.It advises young people to give up their idea of becoming writers. C.It shows that writers usually live in poverty and isolation. D.I...
【单选题】The writer advises us to think about ecology, because ______.
A.
it enables us to survive in the closed system of a spaceship
B.
it is a modern science that everybody has to learn
C.
it can be learned quickly if we study it hard
D.
it helps us to understand the relationship between living beings and the environment
【单选题】The writer advises those who hesitate to sell their stocks for money to
A.
sell unless the market goes up.
B.
buy more stocks during a bull market.
C.
wait for the long haul.
D.
sell out as soon as possible.
【单选题】The writer advises us to do the following to prepare for a fire except that ________.
A.
we practice for a fire
C.
we buy fire extinguishers
D.
we use electrical cookers
【判断题】活门室是缓冲气体流速,起保护活门的作用,它能使吸气、排气平稳,使气体平衡均匀余隙控制气缸余隙容积为3%~8%,气缸余隙通常为5%~12%