进行天然气压缩操作必须小心，但不必（）。A、严格遵守所有与压缩机使用有关的规定； B

男，35岁。右膝关节内侧疼痛、肿胀半年，曾在外院摄X线片，见右胫骨上端内侧有一5cm×4cm大小透光区，中间有肥皂泡沫阴影，骨端膨大。近1个月来肿胀明显加重，夜间疼痛难忍，右膝关节活动受限。入院后X线摄片示胫骨上端病变扩大，肥皂泡沫阴影消失，呈云雾状阴影，病变侵入软组织。

该患者最可能的诊断是（）

A.骨肉瘤

B.骨软骨瘤恶变

C.骨囊肿

D.骨纤维肉瘤

E.骨巨细胞瘤恶变

下列书写不正确的一组是( )。

A．真知灼见 深居简出 一劳永逸
B．买椟还珠 初生牛犊 连篇累牍
C．先发制人 投机倒把 金榜提名
D．言简意赅 戴罪立功 人才辈出

English nowadays is widely used in science, business, the media and popular culture. For example, 80% of e-mails on the internet are in English. But where will English be at the end of the 21^st century?

One view is that English is going to become even more important as a global language, being most widely used in trade and media while some other languages will become less important or just disappear. Another view is that English is already breaking up into several separate languages. There are already dictionaries of the “New Englishes”, such as Australian English, full of words that a British English speaker would not recognize.

Hopefully, neither of these things will happen. Although different varieties of English will continue to develop around the world, standard English will survive for international       communication. However, it is impossible for one language to totally control the world. Already, other languages are fighting back against the control of English on the net. Governments around the world are also starting to protect smaller languages and recognize the importance of keeping a variety of cultures and languages. English will probably stay in control for a long time, but it certainly won’t become the only language in the world.

小题1: According to the situation, how many people do you think speak English now?

A．200 million

B．300 million

C．500 million

D．a billion小题2:At present, what is the most important language in the world?

A．Chinese

B．English

C．French

D．German小题3:What is the best title of the passage?

A．The Change of English

B．Different Varieties of English

C．The Future of English

D．The Cause of English Change

继电保护装置在新投入及停运后投入运行前应做哪些检查？

关于总价合同的说法，正确的有（）

A.采用固定总价合同，双方结算比较简单，但承包商承担了较大的风险

B.发包人能更容易，更有把握地对项目进行控制

C.固定造价合同适用于工程结构和技术复杂的工程

D.在固定总价合同中，承包人承担工程量风险主要是人工费上涨

E.由于承包人的失误导致投标报价计算错误，合同总价不予调整