bn nhớ nha mk ns cho bn nghe bn phải tick cho mk đó

bn ơi cái đó qua lâu rồi bn ak

bây giờ 2017 mà khi đó 2016 mà

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 28.

If you're an environmentalist, plastic is a word you tend to say with a sneer or a snarl. It has become a symbol of our wasteful, throw-away society. But there seems little doubt it is here to stay, and the truth is, of course, that plastic has brought enormous (23) ________, even environmental ones. It’s not really the plastics themselves that are the evil ─ it's the way society chooses to use and (24) ________ them.

Almost all the 50 or so different kinds of modern plastic are made from oil, gas or coal ─ non-renewable natural (25) ________. We (26) ________ well over three million tones of the stuff in Britain each year and, sooner or later, most of it is thrown away. A high (27) ________ of our annual consumption is in the form of packaging, and this (28) ________ about seven percent by weight of our domestic refuse.

Điền vào ô trống 25

A. processes 

B. resources 

C. products 

D. fuels

ko bn ạk

Mk bít bn ak. Mà ưa thứ 5 lâu òi

Mk đồng ý. Vì làm cho zui

Nguyên tử X có 20 proton, nguyên tử Y có 17 proton. Công thức hợp chất hình thành từ hai nguyên tử này là

A. X₂Y với liên kết ion

B. X₂Y với liên kết cộng hóa trị

C. XY₂ với liên kết cộng hóa trị

D. XY₂ với liên kết ion