$4^x+1=2^{x}m\cos \left(\pi x\right)$ cos nghiệm duy nhất. Số giá trị của tham số m thỏa mãn là

Quyết định lấy ngày 3 tháng 2 hàng năm là kỷ niệm thành lập Đảng được thông qua tại đại hội Đảng lần :

A. Tại Hà Nội 1960

B. Tại Hà Nội 1976

C. Tại Ma Cao 1935

Giai tầng nào không được xác định là lực lượng cách mạng trong cương lĩnh chính trị đầu tiên của Đảng cộng sản Việt Nam 

trung, tiểu địa chủ

đại địa chủ, TS

tiểu TS, trí thức

công nhân, nông dân

“Sorry for being late. I was …….. in the traffic for more than an hour.”
A. carried on B. held up C. put off D. taken after

Larry was so……..in his novel that he forgot about his dinner cooking in the oven.
A. absorbed B. attracted C. drawn D. obliged

…….. these books to the library, as they will soon overdue.
A. Bring B. Take C. Fetch D. Leave

nhiệm vụ nào không được ghi trong cương lĩnh chính trị đầu tiên của Đảng cộng sản Việt Nam :

a. thành lập chính phủ VN Dân chủ cộng hòa

b. đánh đổ đế quốc Pháp, phong kiến, tư sản phản CM

c. thành lập chính phủ công nông binh, tổ chức quân đội công nông

d. tịch thu ruộng đất của đế quốc, phản CM chia cho dân nghèo

We need to import……..from abroad.
A. a great deal of sports equipment B. many sports equipments
C. a sports equipment D. many pieces of sports equipment

A sudden idea ……..to the cyclist that he might try the new method.
A. occurred B. happened C. took place D. took part

Lucy was late for school this morning because the alarm didn’t ……..as usual.
A. ring off B. get off C. go off D. take off

Tom’s eyes were red ……..he had been swimming in a chlorinated pool.
A. so B. but C. because D. in case

Jane cooks well……..she hates washing up afterwards.
A. however B. therefore C. so D. but

He had changed so much since the last time we met that I …….. him.
A. could recognize B. could hardly recognize
C. wouldn’t have recognized D. don‟t recognize

: You should take regular exercises instead of sitting in front of the television all day. 

A. Taking regular exercises is better than sitting in front of the television all day. 

B. Sitting in front of the television all day helps you take regular exercises. 

C. Sitting in front of the television all day and taking exercises are advisable. 

Only with careful environmental planning can we protect the world in which we live. 

A. Careful environmental planning protects the world we live in. 

B. Planning the environment carefully, we can protect the world in which we live. 

C. Protecting the world we live in, we plan the environment carefully. 

D. We can protect the world we live in only with careful environmental planning. 

We strongly believe that he's innocent of the crime. We do not think that he did it.
A. crimeless B. skillful C. clean D. guilty opposite

The most important thing is to keep yourself occupied.closest
A. relaxed B. comfortable C. possessive D. busy

She was brought up in a well-off family. She can’t understand the problems we are facing.
A. poor B. broke C. wealthy D. kind(closest

There are many______in our library.
A. interesting American old history books B. old American interesting history books.
C. interesting old American history books D. American interesting old history books

This is the latest news from earthquake site. Two- thirds of the city______in a fire.
A. has been destroyed B. have been destroyed
C. were destroyed D. was destroyed

The fire______to have started in the furnace under the house. 

A. is believed              B. that is believed       C. they believed          D. that they believe 

My sister is a woman of______age. 

We regret to tell you that the materials you ordered are______. 

A. out of stock            B. out of practice        C. out of reach            D. out of work 

When he started that company, he really went______. It might have been a disaster. 

A. out on the limb       B. on and off               C. over the odds          D.once too often 

The festival has many attractions. It will include contemporary orchestra music and an opera. 

____ , there will be poetry readings and theatrical presentations. 

A. Otherwise               B. Furthermore           C. Nevertheless           D. On the other hand 

In the early years of the 20th century, several rebellions______in the northern parts of the country. 

A. turned out               B. rose up                    C. broke out                D. came up 

People have used coal and oil to______electricity for a long time. 

A. bred                        B. raise                        C. cultivate                  D. generate 

The instructor blew his whistle and______. 

A. off the runners were running                     B. off ran the runners 

A quick look would reveal that France has twice______computers. 

A. more televisions than                                 B. many as televisions as 

Dr. Sales is a person______. 

A. in that I don’t have much confidence        B. whom I don’t have much confidence in him. 

C. in whom I don’t have much confidence    D. I don’t have much confidence 

"Oops! I’m sorry for stepping on your foot" – “______.” 

A. Never mind            B. You don't mind      C. You're welcome     D. That's fine 

How do you like your steak done?” _ “_______.” 

Antarctic blue whales can be 100 foot long and weigh more than any dinosaur that ever lived. 

1.So sánh

a, $4\sqrt{7}$và $3\sqrt{13}$

b,$\frac{1}{4}\sqrt{82 }$ và 6$\sqrt{\frac{1}{7}}$

2.Rút gọn biểu thức 

a, $\sqrt{98}$ - $\sqrt{72}$+ 0.85$\sqrt{8}$

b. $\sqrt{16a }+2\sqrt{4ba}-3\sqrt{90a}$ với a$\ge$0

c.$\left(2\sqrt{3}+\sqrt{5}\right) \times \sqrt{3}-\sqrt{60}$

d, $3\sqrt{13}$0

For such a demanding job, you will need qualifications, soft skills and having full commitment.