Question

Якщо робите то все будь ласка Choose the correct item (A, B, C or D) to complete the sentences. Nanotechnology deals (13) ___________ materials on an extremely small scale. Nanomaterials can include particles, films, wires or even complete structures, (14) ________ balls and tubes. What’s key is their size. The prefix nano means a billionth. The largest objects (15) ____________ by pioneering nanotechnologists are only 100 nanometers, or 100 billionths of a meter, across. Most are much (16) __________ . Some are only (17) __________ atoms – a single nanometer – in diameter. For comparison, a human hair is about 20,000 nanometers (0.0008 inch) wide. And size is important. As materials shrink, their physical and chemical properties can change. For example, at the nanoscale gold isn’t yellow. Instead it (18) __________ red, green, blue or even purple, depending on the size of the particles. This is due to effects that take place on a quantum scale. A B C D 13. of with by in 14. to include included including includes 15. created creates creating creation 16. small smaller smallest the smallest 17. little less a little a few 18. appeared appearing appears to appear

Answer 1

Ответ:

13 B (with)

14 C (including)

15 A (created)

16 B (smaller)

17 D (a few)

18 C (appears)

Объяснение:

Nanotechnology deals (13) with materials on an extremely small scale. Nanomaterials can include particles, films, wires or even complete structures, (14) including balls and tubes. What’s key is their size. The prefix 'nano' means a billionth. The largest objects (15) created by pioneering nanotechnologists are only 100 nanometers, or 100 billionths of a meter, across. Most are much (16) smaller. Some are only (17) a few atoms – a single nanometer – in diameter. For comparison, a human hair is about 20,000 nanometers (0.0008 inch) wide.

And size is important. As materials shrink, their physical and chemical properties can change. For example, at the nanoscale gold isn’t yellow. Instead it (18) appears red, green, blue or even purple, depending on the size of the particles. This is due to effects that take place on a quantum scale.

Answer 2

13. A) of
14. B) including
15. A) created
16. B) smaller
17. C) a little
18. D) appears