Thủy phân 324 gam tinh bột với hiệu suất của phản ứng là 75%, khối lượng glucozơ thu được là

A. 300 gam. 

B. 360 gam.

C. 270 gam

D. 250 gam.

Tính thể tích V của khối lăng trụ tam giác đều có độ dài tất cả các cạnh đều bằng a

A.  V = a 3 3 4

B. V = a 3 2 3

D. V = a 3 3 2

D. V = a 3 2 4

Tên thông thường của  CH 2   =   CH   –   CH   =   CH 2

A. anlen

B. butađien.

C. butilen.

D. buten.

Fill in each numbered blank with one suitable word or phrase.

Online Dating

Dating people online has become an extremely popular custom that has developed as more and more people have figured out the (1)______ of using the Internet as a way of finding love. People of all ages submit to dating online, teens and adults (2)______ searching for that special person by setting up (3) _______on online dating sites and browsing through other people’s profiles. On dating websites, singles are provided the (4) ______of  learning a few things about various potential partners, making their decision of contacting them based (5)_____ dating profile descriptions and photos. Out of the many countries where people practise online dating, the United Kingdom is perhaps the keenest on online dating (6) ______ most English people prefer to browse on the Internet in order to find (7) ______ instead of  trying to meet other persons in bars, clubs, parks or at parties. Dating may vary across the globe, yet as time passes, people develop (8)_______dating customs, such as dating with the help of the Internet. Although this (9)______of dating is mostly practised in the Western civilization, no one can tell for sure what other customs will emerge as the world changes, and whether strict dating will come against some people’s right of choosing whatever partner they see (10)______ for themselves.

Question 6:

A. although

B. so

C. since

D. but

Từ 9 giờ kém 10 phút đến 9 giờ 30 phút có

A. 10

B. 20

C. 30

D. 40

Số liền sau của 4279 là:

A. 4278                   

B. 4269               

C. 4280                   

D. 4289

Đọc số, viết số vào chỗ trống:

Fill in each numbered blank with one suitable word or phrase.

Online Dating

Dating people online has become an extremely popular custom that has developed as more and more people have figured out the (1)______ of using the Internet as a way of finding love. People of all ages submit to dating online, teens and adults (2)______ searching for that special person by setting up (3) _______on online dating sites and browsing through other people’s profiles. On dating websites, singles are provided the (4) ______of  learning a few things about various potential partners, making their decision of contacting them based (5)_____ dating profile descriptions and photos. Out of the many countries where people practise online dating, the United Kingdom is perhaps the keenest on online dating (6) ______ most English people prefer to browse on the Internet in order to find (7) ______ instead of  trying to meet other persons in bars, clubs, parks or at parties. Dating may vary across the globe, yet as time passes, people develop (8)_______dating customs, such as dating with the help of the Internet. Although this (9)______of dating is mostly practised in the Western civilization, no one can tell for sure what other customs will emerge as the world changes, and whether strict dating will come against some people’s right of choosing whatever partner they see (10)______ for themselves.

Question 4:

A. situation

B. time

C. development

D. opportunity

Một kim nam châm tự do. Sự định hướng của kim nam châm là cực Bắc của nam châm chỉ về

A. hướng Đông của địa lí.

B. hướng Bắc của địa lí.

C. hướng Nam của địa lí.

D. hướng Tây của địa lí.

Chiếm 95% diện tích lãnh thổ Ai Cập chính là:

A. Vùng trồng lúa mì, lúa gạo.

B. Hoang mạc.

C. Diện tích rừng.

D. Châu thổ sông Nin.