2月GMAT閱讀機經(jīng)：月球粉塵.

　　春節(jié)大魚大肉的小日子過后，大家是否有點松懈了呢，澳際小編在這祝大家新年快樂也題型大家新年別松懈，為大家分享關(guān)于月球粉塵的機經(jīng)，希望大家能感受到這股暖意，并把它化為能量，在GMAT考試的道路上勇往直前。

　　感謝 爭做gmat狂魔 的考古

　　狗主說第一段相似度很高,但是最后一段講的是program和一些應(yīng)用

　　P1:

　　講以前認為月球很平坦，但是現(xiàn)在發(fā)現(xiàn)月球上有很多坑，然后說月球表面的什么土什么的對機器有損害，對人的肺也是。(后面有考題，問說如果不是宇航員上月球而是用機器人，那么下面那個是正確的：基本確認，選擇說如果機器人能夠避免月球表面的對metal的腐蝕那么這個計劃就是順利的?？傊怯袀€unless的選項，大概是C吧)

　　P2:

　　是講到了APOLO阿波羅號帶回來的什么樣本，然后科學(xué)家只有simulate模擬這種月球的土質(zhì)才能以后在月球上built觀測點開發(fā)月球。(這里有題，好象是infer題吧，大概是選科學(xué)家只有運用這種simulant(這詞我不太懂，約摸是對土質(zhì)的模擬的意思吧)才能夠進行試驗)。然后說現(xiàn)在能夠模擬出那些那些方面的regional 土質(zhì)來了。一大堆細節(jié)，不重要。

　　P3: 不太重要。

　　Until the Apollo astronautsbrought lunar soil samples to Earth during 1969-72, the beli was that theMoon&aposs dry, airless environment lt the soil largely undisturbed. Reality ismuch harsher. A speck of Moon dirt. The strange shape tells a tale of violence:It results from the welding(焊接)of rock, mineral and glass by the heat of micrometeoroid impacts. Micrometeorites,many smaller than a pencil point, constantly rain onto the surface at up to100,000 km/hr (about 62,000 mph), chipping off materials or forming microscopic(tiny)impact craters(坑). Some meltthe soil and vaporize and re-condense as glassy coats on other specks of dust. Impacts weld debris into"agglutinates.(attach)" Complicated interactions with the solarwind convert iron in the soil into myriads(mutiple) of "nano-phase(superhard material)" metallic iron grainsjust a few nanometers wide. These processes form the "regolith" --Greek for stone blanket (litho + rhegos) -- covering the Moon&aposs surface.

　　The Apollo specimens areAmerica&aposs Crown Jewels and are doled(施舍)out in ultra-small samples toscientists who can demonstrate that nothing else will do for high-valueexperiments. Renewed interest in lunar exploration in the late 1980smeant that lunar simulants were needed to test schemes(計劃) for building structures on the Moon or forextracting oxygen and other materials. That led to JSC-1 in 1993, madeof basaltic volcaniccinder cone deposits from a quarry near Flagstaff, AZ. The 25-ton lot --distributed in 50-pound bags -- proved popular.

　　MSFC is developing three newsimulants. Two will represent mare(thelarge dark areas on the Moon)and polar highlands regions. A third will represent the glassy, sharp, jagged(鋸齒狀的) edges of regolith thattest the best of hardware(指器械) andhumans. But matching every location on the Moon would require large numbers of small,unique, expensive batches.

　　"Instead, we willdevelop root simulants and manufacture specific simulants from these, but alsoenable investigators to enhance the products as needed," McLemore added."I liken this process to baking a cake: depending on the type of cake youwant, you need certain ingredients for it to come out right and taste right.Getting the recipe right whether for a cake or lunar simulants iscritical." For example, the new mare simulant will be enriched withilmenite(a mineral), a crystalline iron-titanium oxide. Source materials used toproduce the three simulants will potentially come from locations as diverse asMontana, Arizona, Virginia, Florida, Hawaii, and even some international sites.

　　以上就是關(guān)于GMAT機經(jīng)的全部內(nèi)容，考生朋友可以有選擇的看看，最后需要提醒各位的是，GMAT機經(jīng)雖然會對我們解題有所幫助，但是在考場中即使題目很像也要避免秒選，最后祝大家都能考出好成績。