Chất khí X gây ra hiệu ứng nhà kính và tham gia vào quá trình quang hợp của cây xanh tạo tinh bột. Chất khí X là

Trộn bột kim loại X với bột oxit của sắt (gọi là hỗn hợp tecmit) thực hiện phản ứng nhiệt nhôm dùng để hàn đường ray tàu hỏa. Kim loại X là

Ở điều kiện thường, oxit kim loại nào sau đây không phản ứng với nước?

Benzyl axetat có mùi thơm của

Cacbohiđrat không chứa thành phần nguyên tố nào sau đây?

Amin nào sau đây là amin bậc ba? 

The phrase them in the first paragraph is closest in meaning to ________.

Kim loại nào sau đây điều chế được bằng phương pháp thủy luyện?

Chất nào sau đây làm mềm được nước có tính cứng vĩnh cửu?

Vật liệu nào sau đây được chế tạo từ polime thiên nhiên?

Cr₂O₃ được dùng để tạo màu lục cho đồ sứ và thuỷ tinh. Tên gọi của Cr₂O₃ là

Cho thanh kim loại Zn vào dung dịch chất nào sau đây sẽ xảy ra hiện tượng ăn mòn điện hóa học?

Kim loại nào sau đây là kim loại kiềm?

Trong dung dịch, ion nào sau đây oxi hóa được kim loại Mg?

Số nhóm amino (-NH₂) trong phân tử lysin là

The word influx in paragraph 2 is closest in meaning to_______.

Chất nào sau đây phản ứng được với sắt tạo thành muối sắt(III)?

Which of the following is NOT mentioned in rising cancers?

The word their in paragraph 1 refers to _______.

Once Sara explains why she acted as she did, everything will fall into place.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

Eating well is essential for achieving good physical and mental health.

His resignation is an unfortunate situation that nobody desires.

Mark the letter A, B, C, or D on your answer sheet to indicate the word CLOSEST in meaning to the underlined word in each of the following questions.

Their boycott of the talks constitutes a serious impediment to peace negotiations.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of stress in each of the following questions.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of stress in each of the following questions.

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

The neighbors’ loud music every night is driving me up to the_______.

Paul is trying to find out different _______ in his own restaurant.

She was promoted to a managerial position after consistently delivering exceptional results, _______ up to everyone’s expectations.

Solar panels are regarded as a _______ solution, harnessing the power of the sun to generate electricity and reduce reliance on traditional sources of power.

David _______ all of his assignments before he was absent from his company.

After graduating from well – known university, she felt confident and applied _______ the job she liked before.

Students are banned from smoking at schools, _______?

I am not allowed _______ with my groups of friends too late.

The latest sale off _______ by shopaholics on Facebook or Tiktok.

After years of traveling many different places, Mike decided to _______ and get married to his girl friend in his hometown.

My brother went to _______ United Kingdom to achieve academic education.

The new rules have brought about advancements, _______ to efficiency among the staff.

Huynh Nguyen Mai Phuong, the Vietnamese _______ at Miss World 2023, is set to attend the 71st edition of the global pageant due to take place in India late this year.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Henry always shows that he is _______ than Tony.