A

                                    Giai

a) MB=BC-BM=4(cm)

b) Vì M nằm giữa B và C

mà MB=MC

nên M là trung điểm của BC

c) CI=MC/2=2(cm)

nên BI=6(cm)

uk

thế này mới đúng 

my hobby is watch film .................

lỗi viết rất nhiều

Everyone has their own habits, for example my friend has a habit of playing on the phone after waking up, and I have a habit of reading books before going to sleep. This habit may have been formed since I was young; my mother read me bedtime stories every night when I was not able to read. They could be fairy tales, parables, poems or lyrics. When I started reading well, my mother let me read my favorite books myself. At that time I used to read The famous detective Conan and Doraemon, and my bookcase was almost full with comics. Until I was older, my habit of reading before bed time was still maintained. Instead of just reading comic books like before, now I choose to read more genres, such as short stories by domestic and international writers, ghost stories, Kim Dung’s novels, books written by famous people such as Dreams from My Father, The Audacity of Hope by former US President Barack Obama, Living History by Hillary Clinton … Reading before bed time is not simply a habit, because it helped me a lot in my life. It helps me to improve my memory, learn more useful knowledge, and relax my mind after a long and exhausting day. I think that this habit is wonderful, and I am a lucky person to be both entertaining and learning at the same time

a.300     b.130   c.21   d.313    e.3     f.210

4 giờ = 240 phút

5 giờ = 300 phút

Các loại bóng đèn em biết là

- Bóng sợi đốt

- Đèn led

- Đèn compact