钢筋锈蚀有几种形态？如何处理？

The comprehension passages on this course are designed to help you increase your speed. A higher reading rate, with no loss of comprehension, will help you in other subjects as well as English, and the general principles apply to any language. Naturally, you will read every book at the same speed. You would expect to read a newspaper, for example, much more rapidly than a physics or economics textbook but you can raise your average reading speed over the whole range of materials you wish to cover so that the percentage gain will be the same whatever kind of reading you are concerned with.

The reading passages which follow are all of an average level of difficulty for your stage of instruction.

If you get to the point where you can read books of average difficulty at between 40 and 50 w.p.m. with 70% or more comprehension, you will be doing quite well, though of course any further improvement of speed with comprehension will be a good thing.

When you practice reading with passages shorter than book length, do not try to take in each word separately, one after the other. It is much more difficult to grasp the broad theme of the passage this way, and you will also get stuck on individual words which may not be absolutely essential to a general understanding of the passage. It is a good idea to skim through the passage very quickly first (say 500 words in a minute or so) to get the general idea of each paragraph. Titles, paragraph headings and emphasized words (underlined or in italics) can be a great help in getting this skeleton outline of the passage.

The author suggests that you should not read passages word by word because ().

A. it is not necessary to do so

B. it might simply slow down your reading speed

C. it might be more difficult to catch the general idea of the passages

D. it will result in misunderstanding

成功的测试是指

A．运行测试实例后未发现错误

B．发现程序的错误

C．证明程序正确

D．改正程序错误

总的来说网民平均最少光顾的打折场所是（）。

A．综合性百货商场

B．主题商场

C．超市

D．小店

呕吐伴眩晕、眼球震颤最可能是（）

A.急性胃肠炎

B.前庭器官疾病

C.青光眼

D.脑膜炎

E.肾绞痛

甲、乙、丙、丁共同出资设立一字号为“立达商贸”(已依法核准登记)的个人合伙。四人推举甲为合伙负责人，并约定5万元以下的事项甲可以自主决定，超过5万元的事项须与其余三人协商后决定。2005年，甲未与其他三人协商擅自以立达商贸的名义与华强公司签订了一份买卖合同，约定由立达商贸向华强公司提供管材100吨，每吨5000元，货到后三天付款。立达商贸在交付管材前，发现华强公司经营状况严重恶化。此时，立达商贸可以采取何种措施

A．宣告合同无效

B．中止履行合同

C．直接解除合同

D．行使同时履行抗辩权