Đọc đoạn văn, sau đó trả lời các câu hỏi bên dưới
Going to party can be fun and enjoyable. If you are invited to a party, do call your host up early to inform him or her of whether you are going. If you want to bring someone who has not been invited along with you, you should ask for permission first. Remember to dress appropriately for the party. You will stick out like a sore thumb if you are dressed formally whereas everyone else is in T-shirt and jeans. If you are not sure what to wear, do ask your host.
During the party you may perhaps like to help your host by offering to serve drinks or wash the dishes. Your host would certainly appreciate these efforts. If you happen to be in a party you do not know anyone, do not try to monopolize the host's attention. This is inconsiderate since your host has many people to attend to and can not spend all his or her time with you. Instead, learn to mingle with others at the party. You could try breaking the ice by introducing yourself to someone who is friendly-looking.
Before you leave the party, remember to thank your host first. If you have the time, you could even offer to help your host clean up the place
1. What will you do if you are invited to a party?
2. What should you do during the party to help your host?
3. What could you do if you don't know anyone at the party?
4. Should guests leave the party without saying thank to their host?
Một gen có chiều dài 0,51 micromet, tổng tỉ lệ nucleotit loại A với nucleotit khác là 40%. Một mạch của gen có nucleotit loại A là 200, loại G chiếm 30% TÍnh
1. Tổng số liên kết hidro của gen
2. Khối lượng phân tử của gen
3. Số liên kết hóa trị của gen
4. Số nucleotit từng loại của từng mạch gen
5. Nếu gen trên tự nhân đôi 3 lần thì;
a) Số nucleotit từng loại môi trường cung cấp là bao nhiêu?
b) Tổng số liên kết hóa trị trong gen con là bao nhiêu?
c) Số liên kết hidro trong các gen con có nguyên liệu hoàn toàn mới là bao nhiêu?
Tìm lỗi sai và sửa (giải thích đáp án hộ mình luôn với nhá)
1. The women (A) is talking (B) to (C) Jim is Autralian (D)
2. Why are you (A) so late? - I am waiting (B) here for more (C) than (D) onehour
3. If you want (A) to get more (B) money, you should (C) apply to (D) anotherjob
4. It believes (A) that our lives (B) will be better (C) in (D) thefuture
5. He told (A) them to obey (B) the traffic law when traveling (C) on (D) theroad
Nếu biết \(\frac{sin^4a}{a}+\frac{cos^4a}{b}=\frac{1}{a+b}\) thì biểu thức \(M=\frac{sin^{10}a}{a^4}+\frac{cos^{10}a}{b^4}\) bằng
A. \(\frac{1}{\left(a+b\right)^5}\)
B. \(\frac{1}{a^5}+\frac{1}{b^5}\)
C. \(\frac{1}{a^4}+\frac{1}{b^4}\)
D. \(\frac{1}{\left(a+b\right)^4}\)