你知道吗？蛇是没有耳朵的。不过，如果蛇将头贴在地面上，头中的一块骨头就会接收到正

手术前有关皮肤的准备，哪一项是不正确的（）

A．手术前一日沐浴，洗头

B．修剪指（趾）甲，更换衣服

C．剃去手术区皮肤的毛发

D．腹部手术擦净脐部污垢

E．备皮由病人或家属来完成

根据短文内容，从短文后的选项中选出能填人空白处的最佳选项。选项中有两项为多余选项。

                                                                The Mississippi

     The Mississippi is a great river whose relationship with man goes way back beyond its discovery in the

16th century. The River Indians used it as a highway and as a source of food, and it was they who gave it

its name-"misi" meaning "great" and "sipi" meaning "water". When the length of its branch, the Missouri, is

added to it, the Mississippi becomes greater. 1_____. From the source of the Missouri to the tip of the delta

(三角洲), it is 2480 miles long.

     Great rivers are likely to suffer floods. In 1927 the Mississippi flooded 26 thousand acres, sweeping

away farms, towns, everything in its path. In 1938 its floods drowned or killed 200 people and made millions

homeless. Today the river has largely been controlled. 2_____.

     Industries have spread down some of the waterways of the delta, but otherwise the delta is a remote place,

the homeland of a little colony of French Canadians that the British drove out of Nova Scotia in the 18th

century. They still speak French, mixed with English, Indian, Spanish and Negro idioms. They keep to

themselves, farming the rich soil of the delta. 3_____. 

     4_____. Pioneers who first reached its banks wondered not only where it went, but what lay beyond. In

1764 the French founded a city on the right bank of the river, and named it after their king, Louis XV. This

city, named St. Louis, became the jumping-off place for the adventurous men and women who opened up

the Great Plains, and the way to the Far West.

     Some 40 years earlier, at the beginning of the 18th century, the French had founded another city just above

the Mississippi delta, New Orleans. 5_____. New Orleans is one of the great ports of the world, and one of

the greatest terminals for both sea and river traffic.

A. It was the Mississippi that made the city what it is

B. Levees, high banks built of earth, hold back the flood waters

C. Therefore, as we know, it's the third longest river in the world

D. It is known that the "Great Water" has also been a frontier river

E. However, they paddled up and down the Mississippi in their boats to seek their fortune

F. The "Great Water" always remains a thread, for the streets of the city are below the'level of the river

G. They call themselves Cajuns, who have actually been leading fairly primitive lives and preserving their own

     traditions

我国小学课程的设计必须做到高度的（）的统一。

行政法律关系的当事人的行为，特别是行政机关的行为，不仅要合法而且要合理，也就是行政行为要做到合理、恰当和适度。这指的是行政法的（）。

A.公平原则

B.行政合法性原则

C.行政合理性原则

D.程序正当原则

论述折页折数对产品质量的影响。