Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks.

Can you imagine what life would be like if there were no telephone? You could not call (51)________your friends on the phone and talk to them. If fire (52)________out in your house you could not call the fire department. If somebody was sick, you could not call a doctor.

In our daily life we need to (53)________with one another. We need do this mostly by speaking to other people and listening to (54)________they have to say to us, and when you are close (55)________them you can do this very easily. However, our voices will not travel very far even when we shout.

The man who (56)________this possible was Alexander Graham Bell, a Scotsman, born in Edinburgh in 1847. Bell, a teacher of visible speech who later moved to Canada, (57)________all his spare time experimenting. (58)________enthusiastic was he in his research for a means of sending speech (59)________electricity that he left much time for his day-to-day work and at one time was (60)________ penniless.

Question 59

A.with

B.in

C.by

D.on

Cho các phản ứng sau:

Các phản ứng xảy ra trong quá trình sản xuất supephotphat kép là

A. (1), (3).

B. (2), (4).

C. (2), (3).

D. (1), (4).

Cho dãy các chất: metyl acrylat, tristearin, saccarozơ, glyxylalanin. Số chất bị thủy phân khi đun nóng trong môi trường axit là 

A. 3.  

B. 4

C. 2.  

D. 1. 

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks.

Can you imagine what life would be like if there were no telephone? You could not call (51)________your friends on the phone and talk to them. If fire (52)________out in your house you could not call the fire department. If somebody was sick, you could not call a doctor.

In our daily life we need to (53)________with one another. We need do this mostly by speaking to other people and listening to (54)________they have to say to us, and when you are close (55)________them you can do this very easily. However, our voices will not travel very far even when we shout.

The man who (56)________this possible was Alexander Graham Bell, a Scotsman, born in Edinburgh in 1847. Bell, a teacher of visible speech who later moved to Canada, (57)________all his spare time experimenting. (58)________enthusiastic was he in his research for a means of sending speech (59)________electricity that he left much time for his day-to-day work and at one time was (60)________ penniless.

Question 56

A.made

B.had

C.did

D.brought

Cho các phát biểu sau về cacbohiđrat:

(a) Glucozơ và saccarozơ đều là chất rắn có vị ngọt.

(b) Tinh bột và xenlulozơ đều là polisaccarit

(c) Trong dung dịch, glucozơ và saccarozơ đều hòa tan Cu(OH)₂, tạo phức màu xanh lam.

(d) Khi thủy phân hoàn toàn hỗn hợp gồm tinh bột và saccarozơ trong môi trường axit, chỉ thu được một loại monosaccarit duy nhất.

Số phát biểu đúng là

A. 6.

B. 3.

C. 4.

D. 5.

Chọn phát biểu đúng:

A. Khi thủy phân mantozơ trong môi trường axit tạo thành các đơn phân khác nhau.

B. Tinh bột là polime thiên nhiên tạo bởi các phân tử α-glucozơ.

C. Xenlulozơ bị thủy phân hoàn toàn trong môi trường kiềm.

D. Glucozơ thuộc loại hợp chất đa chức