斜导柱倾角

下列各项中，属于营业税应税劳务的是（）。

A.修理机器

B.修缮房屋

C.修复古董

D.裁剪服装

Questions 63 to 67 are based on the following passage: ( 10分 )　　Architecture is the art or science of designing and constructing buildings with durable materials following certain canons.　　Historically, architecture has followed a succession of recognizable styles that may, for example, be identified as Gothic, Baroque, or Neo-Classical; or it has a specific style associated with a particular culture, such as Greek, Roman, or Egyptian.　　Architectural style, even if it is a country house, factory, hotel, airport, or religious building, reflects the values as well as the needs of the society that produces it. However, it is governed not only by taste and aesthetic interest but also by many practical considerations.　　The availability of suitable materials is closely linked to the development of skills and influenced the shapes of buildings. Carpentry developed in areas of the world that were thickly forested. Although it has become scarcer, timber remains an important building material.　　In other areas, stone and marble were chosen for important monuments because they are fireproof and durable. Stone is also a sculptural material; stone architecture was often integral with stone sculpture. The use of stone has declined today because a number of other materials, such as glass, steel, and concrete are more economical to use and assemble.　　In regions where both timber and stone were scarce, earth itself was used as a building material. Mud or clay was compact into walls or made into bricks that were dried in the sun. Later, bricks were baked in kilns, which gave them greater durability.　　Building with stones or bricks is called masonry. The elements cohere through sheer gravity orthe use of mortar. The Romans found a natural cement that, combined with insert substances, produced concrete. In the early 19th century a truly waterproof cement, the key ingredient of modem cement, was developed. So, it is said that Romans are great contributor to the development of architecture.

The writer of this article dose not mention

A．the style of the buildings

B．the materials of the buildings

C．the concept of architecture

D．the areas where stone and timber are rich

发电机的电子调压器是利用稳压管作为感应元件，控制晶体管的（）来实现对电压的自动控制。

A.充电

B.放电

C.导通

D.截止

E.放大

为了有效地做好保卫工作，必须了解各种危害因素发生的可能性和规律性，有的放矢地实施办公室的安全保卫（）。

我国（）之间发生的一切经济交易均须向相外汇管理部门报告，此报告即国际收支申报。

A.居民与非居民

B.公民和外国公民

C.境内机构和境外机构

D.境内主体和境外主体