重度颅脑损伤深昏迷病人，维持呼吸道通畅，防止缺氧的最有效方法是 A．维持吸氧 B．放

如图所示的电路，R₁=20Ω，变阻器R₂的阻值范围为0～40Ω，当变阻器滑片P移至变阻器的中点时，电流表的示数为0.5A，那么当变阻器滑片P移至阻值最大位置时，电流表的示数多大？

补全对话。

Samuel: Chen Li, can I have a look at your copy of China Daily?

Chen Li:    1   . 

Samuel: I want to have a look at what's on this weekend. Let me see now.

Chen Li: Is there anything good on?

Samuel: Purple Rain Storm is giving a performance at the People's Theatre.    2   ?

Chen Li: They're a pop group formed by three girls. They're said to be very good.    3   ?

Samuel: 7:30 p.m.    4   ?

Chen Li: Yes, I'll be free. I'd like to go.

Samuel:     5   . I'll meet you at the theatre at 7:15.

Chen Li: Good! See you then. Bye.

1._______ 2._______ 3._______ 4._______ 5._______

下列符合重大火灾标准的是（）。

A．15人死亡 

B．60人重伤 

C．1000万元财产损失 

D．直接经济损失7000万元 

E．直接经济损失1亿元

扫线时应先扫轻油后扫重油。

To a cowboy, the bandanna was once ______.

A．almost as important as his lasso (套索)

B．more important than his lasso

C．a decoration

D．a flag