液压制动器的制动液，不同规格的制动液不能混用。

印花机织灯芯绒，绒面按重量计含羊毛50%，含涤纶短纤50%(幅宽110cm，每平方米重360克)

青霉素过敏性休克应首选

A．肾上腺素

B．去甲肾上腺素

C．糖皮质激素

D．苯海拉明

E．尼可刹米

阅读理解。

     At 2:30 December 5, 1945, five US Navy training planes took off in clear weather from the base Lauderdale, Florida. The planes flew east over the coast… and disappeared. The group was Flight 19, on a run between

Florida and Bahamas. Tailor was the group leader. At about 3:40, Tailor reported that his compasses (指南针)

were not reading properly. The other planes followed their leaders aimlessly, first east, then west, then

northeast over the ocean, as Tailor tried to make sure of the direction by radio. Then, suddenly Tailor was

heard to give orders to dive…

     Quickly, two giant Martin seaplanes were sent up to search for Flight 19. Several hours later, the wind

became strong and visibility (能见度) dropped. A return to base was ordered. But only one of the Martin

seaplanes landed. Four days later, the Navy and Coast Guard combed a 100,000 square-mile area with more

than 100 planes and ships. No sign was ever shown of the missing planes.

     Today, people have noted the disappearance of many ships and planes in the southwest part of the North

 Atlantic and began to call this area the Bermuda Triangle.

     The points of the triangle are Bermuda, Puerto Rico and a particular place in the Gulf of Mexico, west of

Florida. It is a two-faced water world of tiny islands, bright beaches and beautiful waters. Yet thick fogs,

powerful currents (激流) and sudden storms are hidden behind this smiling surface.

1. In what position did Flight 19 disappear?

A. In the southeast part of the Atlantic Ocean.

B. In the northeast part of the Atlantic Ocean.

C. To the southwest of Bermuda in the Atlantic Ocean.

D. To the northeast of Bermuda in the Atlantic Ocean.

2. How many planes disappeared altogether that day?

A. Five

B. Six

C. Two

D. Only one.

3. The word "comb" in the passage means _____.

A. cover with

B. fly over

C. do up one's hair with a comb

D. search all over

4. Which of the following shows the correct position of the Bermuda Triangle?

   (F = Florida, Bm = Bermuda, PR = Puerto Rico, Bh = Barhamas, MG =the Gulf of Mexico,

   Atl = the Atlantic Ocean, B=Base)

（）越低，表明供应商考察的分越高

A.配合度

B.准时交货率

C.逾期率

D.平均合格率

简述牙周脓肿治疗原则。