锅炉膜式水冷壁在不同部位布置了______及各种测量孔等。A．入孔 B．燃烧器孔 C

引起支气管哮喘发作的因素是（）。

A.β受体功能低下

B.cAMP下降

C.PGF₂α升高

D.cGMP上升

E.β受体功能亢进

用户在CTCS-2列控系统车载设备DMI编辑基础数据输完成后，按压功能键（）“确定”按钮，DMI接收编辑的数据，并返回基础数据输入界面。

A.F3

B.F4

C.F5

D.F6

School Groups:$10.00 per person

One free teacher admission per 10 students.

Group rates apply to groups 15 or more.

Click HERE to make a reservation online today!

The Miami Planetarium(天文馆) opened its doors to the public on November 4, 1966 and has entertained and educated children of all ages about astronomy and the wonders of the night sky ever since. The planetarium houses a 65-foot diameter doomed projection screen with 231 seats.

At the heart of the Planetarium is a SPITZ “Space Transit Planetarium” star projector(放映机), which is capable of accurately reproducing the stars and planets as seen from anywhere on Earth at any time during the year. Shows daily except Thanksgiving and Christmas Day. Unlike any other in South Florida, the Planetarium is a unique setting for bringing the stars and planets indoors in animated live star shows and music filled laser light shows.

The Weintraub Observatory（天文台） houses two powerful telescopes. Observatory hours are from 8:00p.m. to 10:00p.m. Look through the telescope to view the planets, the four moons of Jupiter, the rings of Saturn and deep sky objects such as galaxies, nebulas and double stars.

Deposit: A $ 75 deposit must be received 10 days ahead of the visit date to guarantee your visit.

Cancellation Policy：The museum requires 48 hours advance notice prior to any cancellation or other changes to a reservation. Without prior notification the original total will be expected upon arrival.

Payment Policy: The balance of the admission fee is due upon arrival at the museum on your visit day.

Upon arrival: The leading teacher should check in at the box office with payment for the correct head count of students and teachers. Visitors should remain on the bus until a museum interpreter show you around the museum.

Museum Etiquette: We ask that all groups remain together and orderly. Teachers are asked to help maintain order with their groups. We reserve the right to refuse service to any group or individual not obeying the museum policies.

Bus procedures: The museum will provide parking for buses in our parking lot. Upon arrival, bus drivers will be directed by the museum staff to the appropriate places to park. It is recommended that buses remain on the spots throughout the group’s entire museum visit.

For more information & reservations call: (305)646-4222.

小题1:In the Miami Planetarium, visitors can _________.

A．look through the telescope to view the Mars at 11 p.m.

B．enjoy the roller coaster on the weekend.

C．watch animated live star shows on December 1

D．watch animated live star shows on December 25小题2:If twenty students are to visit the Miami Planetarium together with five teachers, how much will they have to pay for the admission fees in total?

A．$230

B．$250

C．$150

D．$200小题3:To make sure that you can visit the Miami Planetarium on time, you must_____

A．pay the total admission fees in advance.

B．pay some of the admission fees in advance.

C．rent the bus owned by the planetarium

D．book the visit five days before the visit date小题4:We can infer from the passage that _________.

A．the Miami Planetarium has a history of over 60 years

B．the Miami Planetarium is very popular among moviegoers

C．the Miami planetarium is located in North Florida.

D．the Weintraub Observatory is not open to visitors during the day.

为什么实际生产中真空碳脱氧远没有热力学计算那么强？

电火花和雷击引起燃烧、爆炸事故是烟花爆竹生产企业的重大安全问题。某烟花爆竹生产企业的下列做法，不正规的是。（）

A.照明灯装在了室外，往室内投光

B.有药车间架设了临时的电气线路

C..车间内各种电气设备的外壳，由专业人员一周清理一次，非专业人员禁止触摸

D.以上做法都不正规