Lexical and Grammatical Competency

Lexical and Grammatical Competency
You are going to read a passage about rubber trees. For a question given at the end of the passage, choose the answer (А. В. С or D) which you think fits best according to the passage.. Rubber trees are tapped - that is, cuts are made in the bark so that the latex, a milk-like Juice, containing about 30-40% rubber, can be obtained. The latex is then processed by exposing it to heat and wood smoke, or by mechanical means, so as to separate the rubber from the `water, mineral salts, sugars, resins and protein matters. The rubber obtained in this way is known as, `crude` - latex is extensively used in industry for making foam rubber, products. footwear, dolls etc. Untreated crude rubber is naturally soft and lacks the required strength for making into manufactured articles. To improve its strength and usefulness, it is vulcanised, or heated with sulphur, and the proportion of sulphur used determines the hardness and elasticity of the rubber. It is stated in the passage that untreated crude rubber is not used in industry, because ___________.
1. its content of sulphur carries a nasty odour
2. its milky colour is undesirable
3. it`s neither hard nor strong enough
4. it lacks any kind of elasticity

Результаты (узбекский) 1:

Leksik va Grammatik Yetkinlik
Siz rezina daraxtlar haqida yurishini o'qish boryapmiz. Agar o'tish ko'ra uvishishi eng yaxshi deb o'ylayman o'tish oxirida berilgan bir savolga, javob (А. В. С~~dobj yoki D) tanlash uchun .. Rezina daraxtlar urib qo'ydi etiladi - ya'ni, kesadi, shunday qilib, po'stloq qilingan taxminan 30-40% kauchuk o'z ichiga lateks, bir sut kabi Juice, olinishi mumkin. Lateks keyin `suv, mineral tuzlar, shakar, qatronlar va oqsil masalalar dan kauchuk ajratish uchun u, issiqlik va yog'och tutun yoki mexanik vositalar bilan fosh ishlov beradi. Shu tarzda olingan rezina crude` `, deb ma'lum - lateks keng ko'pik kauchuk, mahsulotlari qilish uchun sanoatida ishlatiladi. poyafzal, o'yinchoqlar va hokazo Davolamasak xom rezina tabiiy yumshoq va ishlab maqolalarni tayyorlash uchun zarur kuch yo'q. Uning kuch va foydali oshirish uchun, oltingugurt bilan vulkanize yoki isitiladi, va ishlatilgan oltingugurt nisbati kauchuk qattiqlik va egiluvchanligi belgilaydi. Bu, chunki ___________, davolanish bo'lmagan xom rezina sanoati ishlatiladigan emas o'tish etilsin.
1. oltingugurt uning mazmuni bir jirkanch hidi oshiradi
2. uning Somon rang kiruvchi
3. to'plashgani na qattiq, na etarlicha kuchli
4. egiluvchanlik har qanday etishmaydi