焊缝中夹杂物是由于焊接冶金反应形成的。焊接时，由于熔池的结晶速度较快，一些脱氧、脱硫

Prior to the UML, there was no clear leading (66) language. Users had to choose from among many similar modeling languages with minor differences in overall (67) power. Most of the modeling languages shared a set of commonly accepted concepts that are expressed slightly differently in various languages. This lack of (68) discouraged new users from entering the OO market and from doing OO modeling, without greatly expanding the power of modeling. Users longed for the industry to adopt one, or a very few, broadly supported modeling languages suitable for (69) usage.

Some Vendors were discouraged from entering the OO modeling area because of the need to support many similar, but slightly different, modeling languages. In particular, the supply of add on tools has been depressed because small vendors cannot afford to support many different formats from many different (70) modeling tools. It is important to the entire OO industry to encourage broadly based tools and vendors, as well as niche products that cater to the needs of specialized groups.

（67）处填（）。

A．control

B．expressive

C．conductive

D．interactive

下列做法符合《未成年人保护法》的有 [ ]

A．父母把逃学的儿子送回学校 

B．父母赌博成性，13岁的孩子流浪在外 

C．我国人民法院成立审理未成年人犯罪的法庭 

D．商贩向中学生偷售有暴力、恐怖内容的书刊 

计算机病毒实质是一个特殊的计算机（）。

恶性骨肿瘤的诊断依据不包括下列哪一项()

A．浸润性骨质破坏 

B．有骨膜反应 

C．有软组织肿块 

D．有肿瘤骨形成 

E．病灶边界清晰

为管理企业的生产经营活动发生的工资、材料消耗、固定资产折旧费等项支出，应记入“管理费用”