Ý nào sau đây đúng khi nói về hệ tuần hoàn của lưỡng cư?

A. Tim 3 ngăn, 2 vòng tuần hoàn.

B. Tim 2 ngăn, 1 vòng tuần hoàn.

C. Tim 2 ngăn, 2 vòng tuần hoàn.

D. Tim 2 ngăn, 1 vòng tuần hoàn

Chu vi của một đa giác là 158 cm, số đo các cạnh của nó lập thành một cấp số cộng với công sai d=3cm . Biết cạnh lớn nhất là 44cm. Số cạnh của đa giác đó là:

A.3

B.4

C.5

D.6

Read the passage about clothes, then answer the questions below.

Clothes can tell a lot about a person. Some people like very colorful clothes because they want everyone to look at them and they want to be the center of things. Other people like to wear nice clothes, but their clothes are not colorful or fancy. They do not like people to look at them. Clothes today are very different from the clothes of the 1800s. One difference is the way they look. For example, in the 1800s all women wore dresses. The dresses all had long skirts.

But today women do not always wear dresses with long skirts .Sometimes they wear short skirts. Sometimes they wear pants. Another difference between1800s and today is the cloth. In the 1800s, clothes were made only from natural kinds of cloth. They were made from cotton, wool, silk, or linen. But today, there are many kinds of man–made cloth. A lot of clothes are now made from nylon, rayon, or polyester.

What is another difference between 1800s and today?

Thành phần nào dưới đây luôn có mặt trong cấu tạo của bất kỳ loại địa y nào ?

A. Tảo      

B. Nấm

C. Vi khuẩn      

D. Rêu

Tính: 357hg x 3.

A. 1071hg

B. 1171hg

C. 1171

D. 1071

Điền số thích hợp vào ô trống:

5 tạ 8kg = ... kg

Biết diện tích hình tròn là 16π. Tính chu vi của đường tròn?

A. 4 π

B. 16 π

C. 8 π

D. 12 π

The site which the space shuttle is going to be launched next week attracts a lot of visitors.

→ ___________________________________.

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

That style of dress ______ have been designed by Titian, because it wasn’t worn till after his death.

A. must

B. might

C. can’t

D. shouldn’t

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 primary stress in each of the following questions.

A. departure

B. furniture

C. endanger

D. determine