问题 单项选择题 A1型题

关于β内酰类抗生素抗菌作用机制的描述哪项错误()。

A.抑制菌细胞壁黏肽合成酶

B.触发细菌的自溶酶活性

C.抑制细菌的自溶酶活性

D.阻碍菌细胞壁黏肽合成

E.菌体膨胀变形

答案

参考答案:C

填空题
阅读理解

阅读理解。

     In the United States, there were some well-constructed houses for native Indians, ranging from the simple

brush shelter to the five-storied pueblo.

     In the eastern United States, one of the existing types was that commonly know under the Algonkian name

of wigwam in which the Iroquois Indians lived. The wigwams were of wagon-top shape with straight sides

and ends, made by bending young trees to form the round shape. Over this shape pieces of tree bark were laid

to protect the Indians from bad weather. Over the bark dried grass was added. A small hole allowed smoke to

escape from the top. Doorways at each end served also as windows, The Iroquois Indians built trunk walls all

around their villages. The wall had only one opening, They could quickly close this opening if their enemies

came near.

     Interestingly, the Choctaw Indians in Mississippi also lived in a wigwam of a most primitive (原始的)

construction, but different from those of the Iroquois Indians. The Choctaw Indians' wigwams, made from

mud, cane and straw, were in the form of a bee-hive. The covering was made of a long, tough grass. A post

in the centre supported the roof. A hole in the top admitted the light, and allowed the smoke to pass out.

     The tipi tent-housing of the upper lake and plains area was put up with poles set lightly in the ground, tied

together near the top, and covered with bark and grass in the lake country. It was easily portable, and two

women could set it up or take it down within an hour.

     The Pawnee, Mandan and other Indian tribes (部落) along the Missouri built solid ring-shaped structures

of trunk, covered with earth and dried grass, housing a dozen families.

     The Wichita and other tribes of the Texas border built large ring-shaped houses covered with dried grass.

     Apart from the regular housing, almost every tribe had some style of housing.

1. Which of the following pictures shows the house for the Iroquois Indians?[ ]

A.

B.

C.

D.

2. According to the passage, the Pawnee Indians built their houses _____. [ ]

A. with openings in the trunk walls

B. large enough for several families

C. in a ring shape with bark and mud

D. by bending young trees to form the shape

3. All the native Indian houses described in the passage were _____.[ ]

A. of the same shape

B. covered with grass

C. built with a post in the centre

D. built with doorways at each end

4. The passage suggests that _____. [ ]

A. all the native Indians built trunk walls all around their houses

B. all the native Indian houses were built with poles tied together

C. the Iroquois Indians took safety into account while building their wigwams

D. the Choctaw Indians in Mississippi built their wigwams with straight sides and ends