It's already 12 o'clock.It is time ____.

A.Cl

B.O

C.N

D.F

E.S

A.Cl

B.P

C.S

D.C

E.O

A.H、Na

B.N、Cl

C.Mg、Si

D.O、S

A.O＞S

B.F

C.Cl＞Br

D.Si

A.N O Cl

B.O F Si

C.N P Cl

D.O P S

M: That's just like you. Okay, don't worry. You can use my car instead.

Q: How will the woman go to see her friend？

(13)

A．She will use the man's car.

B．She will use her own car.

C．She will go on foot.

D．She will rent a car from the garage.

听力原文：W: When is the earliest flight from Washington to New York？

M: There is a shuttle at six, and if that's full, there's another at seven.

Q: What can be inferred from the conversation？

(19)

A．The woman has a choice of early flights.

B．Not many planes go to Washington.

C．The woman should take the earlier flight.

D．The six o'clock flight is already filled.

已知某重油中C、H、O、S的含量分别为84%、12%、2.5%、1.5%。

(1)计算燃油1kg所产生的理论烟气量；

(2)当过剩空气系数为1.2,计算燃油1kg重油所产生的烟气量。(原子量:C:12;H:1;0:16;S:32)

(2)干烟气中SO2的浓度和CO2的最大浓度;(3)当空气的过剩系数为1.1时，产生的烟气量为多少？(原子量:C:12;H:1;O:16;S:32)

A.Zn、V、Cl

B.Cu、B、O

C.o、Mg、Ca

D.C、H、Al