Chọn A

 Hoạt động thông tin của con người

 Hoạt động thông tin của con người

Thông tin là gì?

S=3+32+33+34+35+36+37+38+39

S=(3+32+33)+(34+35+36)+(37+38+39)

S=3(1+3+9)+34(1+3+9)+37(1+3+9)

S=3.13+34.13+37.13S=13(3+34+37)⋮13

125+2. [56-48:(14-2.6).2]

=125+2. [56-48:(14-12).2]

=125+2 [56-48:2.2]

=125+2 [56-48:4]

=125+2 [56-12]

=125+2 .44

=125+88

=213

Chọn A

1. My daughter often (not use) ______doesn't use__________ a computer for school work, but today she (use) _____is using_______ it.

2. ________Is Jane watching___________ (Jane/ watch) TV now?

3. Mark _______doesn't go_________ (not go) to school on Friday afternoon.

4. Put on a raincoat. It is raining. It (rain) ____rains___________ a lot in summer.

5. Where are the children? ~ They (read) ________are reading________ books in the library.

6. It (snow) __________snow______quite hard – perhaps we shouldn’t go out tonight.

7. My mother (not like) _______doesn't like_________ buying food in supermarkets.

8. Sorry, I’m busy at the moment. I (do) _____am doing___________ my homework.

9. They (not eat) _______don't eat_________ meat on Fridays.

10.       John and Jenny (wait) _____are waiting___________ for the bus at the moment

Đọc tiếp

1.must

2.must

3.mustn't

4.must

5.must

6.mustn't

7.mustn't

8.must