Có bao nhiêu giá trị nguyên của tham số m thuộc đoạn [-2018;2018] để hàm số y=(m-2)x+2 đồng biến trên R?

A. 2017

B. 2015

C. Vô số

D. 2016

Một máy biến áp lí tưởng làm việc bình thường có tỉ số N₂/N₁ = 2, khi (U₁, I₁) = (110 V, 10 A) thì (U₂, I₂) bằng bao nhiêu ?

A. (55 V, 5 A)

B. (55 V, 20 A)

C. (220 V, 20 A)

D. (220 V, 5 A)

1. There is a magazine on the table.

=> The magazine is on the table.

2. Lan is Hung's younger sister.

=> Hung is Lan's older brother.

3. Mai is Mrs. Hong's daughter.

=> Mrs. Hong is Mai's aunt.

4. The weather today is very nice.

=> What a nice weather!

5. These books are very interesting.

=> What interesting books!

A.R.M.Y nak

1. She / do / her homework / every evening.

=> She does her homework every evening.

2. She / not/ do / her homework /at the moment.

=> She isn't doing her homework at the moment.

1. This shirt is 55,000.

=> How much is this shirt?

2. Nga is helping Nam.

=> Who is Nga helping?

3. Hoa will clean the floor tomorrow.

=> Who will clean the floor tomorrow?

4. I have five cats.

=> How many cats do you have?

5. She sometimes calls me.

=> How often does she call you?

1. Hoa (have) ...HAS... a lot of friends in Hue.

2. She (be) ...IS... unhappy now. She (miss) ...MISSES... her parents in Hue.

3. IS Hoa (talk)....TALKING... to Miss Lien At the moment?

4. (you be) ...ARE YOU... a new student? - Yes. I (be) ...AM.... in class 7B.

5. Hoa's old school (be) ...IS... small. It (not have) ...DOESN'T HAVE...many students.

6. I (walk) ...WALK... to school every day, but today I (ride)...AM RIDING... to school.

7. We (not go) ...DON'T GO... to class on Sundays.

8. Where ...DOES... Hoa's parents (live)...LIVE...?