Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts 1D our protective blanket on 2C . Light gets through, and this is essential 3D plants to make the food which we 4C . Heat, 5D , makes our environments tolerable and some ultraviolet rays(紫外線的) penetrate the 6C . Cosmic (宇宙的) rays of various kinds come 7D the air from outer space, but 8B quantities of radiation from the sun are screened off. 9A men leave the atmosphere they are 10B to this radiation; 11A their spacesuits or the walls of their spacecraft, if they are inside, 12D prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in 13C . Doses of radiation are measured in 14B called “rem(雷姆)”. We all 15A radiation here on earth from the sun, from cosmic rays and from radioactive minerals. The “ 16D ” dose of radiation that we receive each year is about two milligrams; it 17D according to where you live, and this is a very rough estimate. Scientists have reason to think 18C a man can 19A far more radiation 20B without being damaged; the figure of 60 rems has been agreed.

　　太空是一個(gè)危險(xiǎn)的地方，不僅因?yàn)槟莾河辛餍牵�而且還有來(lái)自太陽(yáng)和其它行星的射線。大氣層又一次充當(dāng)了地球的保護(hù)層。從大氣層透進(jìn)來(lái)的光線是地球植物所必需的，而這些植物則給我們提供了食物。同時(shí)，光線帶來(lái)的熱量使得我們的環(huán)境舒適，還有一些紫外線也穿透大氣層到達(dá)地球。宇宙中各種各樣的射線通過(guò)大氣層到達(dá)地球，然而，來(lái)自太陽(yáng)的強(qiáng)烈輻射則被阻擋在外。一旦人類沒(méi)有大氣層的保護(hù)，就會(huì)受到這種輻射。但是人們穿上航天服或者呆在宇宙飛船里，則可以免受很多輻射的侵害。輻射是目前為止人類所知對(duì)太空探索者最大的威脅。放射線用“雷姆”作為衡量單位。地球上的所有輻射來(lái)自太陽(yáng)、宇宙射線和放射性礦物質(zhì)。我們每年所能承受的“正常輻射值”大約為200毫克，這只是一個(gè)大概的估計(jì)，因?yàn)檫@個(gè)值會(huì)隨著我們居住的環(huán)境而改變。科學(xué)家們認(rèn)為，一個(gè)人能抵擋更多的輻射而不會(huì)受到任何傷寒，這個(gè)輻射值為60雷姆。

　　1. A. for B. with C. on D. as

　　2. A. stars B. sun C. earth D. space

　　3. A. with B. from C. under D. for

　　4. A. use B. live C. eat D. get

　　5. A. again B. also C. besides D. too

　　6. A. environment B. space C. atmosphere D. earth

　　7. A. across B. to C. from D. through

　　8. A. valid B. enormous C. various D. proper

　　9. A. As soon as B. As well as C. As much as D. As possible as

　　10. A. shown B. exposed C. faced D. covered

　　11. A. but B. because C. so D. so that

　　12. A. get B. make C. have D. do

　　13. A. earth B. atmosphere C. space D. environment

　　14. A. pieces B. units C. parts D. elements

　　15. A. receive B. accept C. bring D. catch

　　16. A. conventional B. common C. general D. normal

　　17. A. shifts B. converts C. modifies D. varies

　　18. A. what B. which C. that D. why

　　19. A. put up with B. keep up with C. come up with D. catch up with

　　20. A. from B. than C. as D. away

　　If you were to begin a new job tomorrow, you would bring with you some basic strengths and weaknesses. Success or 1C in your work would depend, to 2A great extent, 3B your ability to use your strengths and weaknesses to the best advantage. 4B the utmost importance is your attitude. A person 5A begins a job convinced that he isn’t going to like it or is 6C that he is going to feel troubled is exhibiting a weakness which can only hinder his success. On the other hand, a person who is secure 7D his belief that he is probably as capable 8C doing the work as anyone else and who is willing to make a cheerful attempt 9D it possesses a certain strength of purpose. The chances are that he will do well. 10C the prerequisite skills for a particular job is strength. Lacking those skills is obviously a weakness. A bookkeeper who can’t add or a carpenter who can’t cut a straight line with a saw 11D hopeless cases. This book has been designed to help you capitalize 12D the strength and overcome the 13B that you bring to the job of learning. But in groups to measure your development, you must first 14B stock of somewhere you stand now. 15A we get further along in the book, we’ll be 16D in some detail with specific processes for developing and strengthening 17C skills. However. 18B begin with, you should pause 19A examine your present strengths and weaknesses in three areas that are critical to your success or failure in school: your 20C , your reading and communication skills, and your study habits.

　　假如明天你開始從事一份新的工作，你會(huì)帶著自身的優(yōu)點(diǎn)和缺點(diǎn)。工作的成敗很大程度上取決于你將自身優(yōu)缺點(diǎn)運(yùn)用到極至的能力，而至關(guān)重要的就是態(tài)度。如果一個(gè)剛剛開始工作的人就深信自己不會(huì)喜歡或肯定不適應(yīng)這項(xiàng)工作，那么阻礙他成功的缺點(diǎn)就暴露出來(lái)了。反之，如果堅(jiān)信自己和別人一樣能勝任這份工作并且勇于做出嘗試，那么他就具有達(dá)到目標(biāo)的優(yōu)勢(shì)，就會(huì)很好地完成工作。所以，優(yōu)勢(shì)是具有某一工作的必要技能，而缺乏這條件的很顯然就是缺點(diǎn)。會(huì)計(jì)不懂加法，或者木匠不會(huì)鋸子鋸出直線都是不成功的例子。這本書就是為你在工作中充分利用優(yōu)點(diǎn)克服缺點(diǎn)而特別編撰的。但是為了分階段衡量你的進(jìn)步，首先必須清楚目前自己的位置。隨著書中內(nèi)容的進(jìn)一步深入，我們將詳細(xì)論述發(fā)展和加強(qiáng)學(xué)習(xí)技能的具體過(guò)程。首先，你應(yīng)該從三方面來(lái)審視目前自己的優(yōu)缺點(diǎn)：態(tài)度、閱讀與交際技巧、學(xué)習(xí)習(xí)慣，這些是你在學(xué)習(xí)成敗的關(guān)鍵。

　　1. A. improvement B. victory C. failure D. achievement

　　2. A. a B. the C. some D. certain

　　3. A. in B. on C. of D. to

　　4. A. Out of B. Of C. To D. Into

　　5. A. who B. what C. that D. which

　　6. A. ensure B. certain C. sure D. surely

　　7. A. onto B. on C. off D. in

　　8. A. to B. at C. of D. for

　　9. A. near B. on C. by D. at

　　10. A. Have B. Had C. having D. had been

　　11. A. being B. been C. are D. is

　　12. A. except B. but C. for D. on

　　13. A. idea B. weakness C. strength D. advantage

　　14. A. make B. take C. do D. give

　　15. A. As B. Till C. Over D. Out

　　16. A. deal B. dealt C. be dealt D. dealing

　　17. A. learnt B. learned C. learning D. learn

　　18. A. around B. to C. from D. beside

　　19. A. to B. onto C. into D. with

　　20. A. intelligence B. work C. attitude D. weakness