A device used to enlarge the size of an existing bore hole，having teeth arranged on its outside circumference to cut the formation as it rotates is a（n）（）.

A device used to enlarge the size of an existing bore hole, having teeth arranged on its outside circumference to cut the formation as it rotates is a (n)（）.

They told me it would be cheap but _____  it cost me nearly $500.

If you cut another car off, its driver may be ______.

The earned value technique is a commonly used method of performance measurement. It integrates project scope, schedule, and cost measures to help the project management team assess project performance. If a project's Cost Performance Index(CPI=EV/AC) value less than 1.0, it means that ( )

●企业IT管理含三个层次：IT战略规划、IT系统管理、IT技术管理及支持。其中IT战略规划这部分工作主要由公司的(42)完成。

●企业IT管理含三个层次：IT战略规划、IT系统管理、IT技术管理及支持。其中IT战略规划这部分工作主要由公司的(42)完成。

______ they to cut down the cost of advertising, the cost of production ______ significantly fall.

The following statements have been made about life cycle costing:(i) It focuses on the short-term by identifying costs at the beginning of a product’s life cycle(ii) It identifies all costs which arise in relation to the product each year and then calculates the product’s profitability on an annual basis(iii) It accumulates a product’s costs over its whole life time and works out the overall profitability of a product(iv) It allocates costs to each stage of a product’s life cycle and writes them off at the end of each stageWhich of the above statements is/are correct?

It’s not advisable to cut（）the power supply.

标准公差分为（）个等级，分别用IT01，IT0……表示。由IT01到IT18，公差等级依次（）。

标准公差分为20个等级，用IT01，IT0，IT1，IT2，…IT18来表示。等级依次增大，标准公差值依次降低。