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Combine the two sentences by using a relative clause. Some of them need a comma. (5pts) 01. We believe that my friend doesn’t do the test well. He didn’t come to class yesterday. . My friend _________________________________________________________________ ___________________________________________________________________________ 02. They believe that the man sells lottery. He became a millionaire. . The...
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Combine the two sentences by using a relative clause. Some of them need a comma. (5pts) 01. We believe that my friend doesn’t do the test well. He didn’t come to class yesterday. . My friend _________________________________________________________________ ___________________________________________________________________________ 02. They believe that the man sells lottery. He became a millionaire. . The man________________________________________________________________ ___________________________________________________________________________ 03. He swam across the English Channel. It is an arm of the Atlantic Ocean that separates Southern England from northern France. .He _______________________________________________________________________ ____________________________________________________________________________ 04. Your sister is talking with a man. Do you know him? .Do _______ ______________________________________________________________ ___________________________________________________________________________? 05. Tom’s car was stolen. He has gone to the police station. .Tom_______________________________________________________________________
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Combine the two sentences by using a relative clause. Some of them need a comma. (5pts) 01. We believe that my friend doesn’t do the test well. He didn’t come to class yesterday. My friend _________________________________________________________________ ___________________________________________________________________________ 02. They believe that the man sells lottery. He became a millionaire. The...
Đọc tiếp
Combine the two sentences by using a relative clause. Some of them need a comma. (5pts) 01. We believe that my friend doesn’t do the test well. He didn’t come to class yesterday. My friend _________________________________________________________________ ___________________________________________________________________________ 02. They believe that the man sells lottery. He became a millionaire. The man________________________________________________________________ ___________________________________________________________________________ 03. He swam across the English Channel. It is an arm of the Atlantic Ocean that separates Southern England from northern France. He _______________________________________________________________________ ____________________________________________________________________________ 04. Your sister is talking with a man. Do you know him? Do _______ ______________________________________________________________ ___________________________________________________________________________? 05. Tom’s car was stolen. He has gone to the police station. Tom_______________________________________________________________________
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18 tháng 12 2021

Answer:

\(\sqrt{1-x^2}=4x^3-3x\left(ĐK:-1\le x\le1\right)\)

\(\Leftrightarrow\sqrt{1-x^2}=4x\left(x^2-1\right)\)

\(\Leftrightarrow\sqrt{1-x^2}+\left(1-x^2\right).4x=0\)

\(\Leftrightarrow\sqrt{1-x^2}=0\)

\(\Leftrightarrow1-x^2=0\)

Trường hợp 1: \(x=1\) (Loại)

Trường hợp 2: \(x=-1\) (Loại)

Trường hợp 3: \(x=0\) (Thoả mãn)

18 tháng 12 2021

rất nhỏ so với chiều dài quỹ đạo

6 tháng 1 2022
Sài đấy🤓🤓🤓
17 tháng 12 2021

B .2 NHA 

4 tháng 1 2022

Gọi quãng đường xe đi trong nửa thời gian đầu và nửa thời gian sau là \(M_1;M_2\)

Quãng đường xe đi trong nủa thời gian đầu là: \(M_1=v_1.\frac{1}{2}t=10t\)

Quãng đường xe đi trong nủa thời gian sau là: \(M_2=v_2.\frac{1}{2}t=15\)

Vận tốc trung bình của xe là: \(v_{tb}=\frac{M_1+M_2}{t}=\frac{10t+15t}{t}=\frac{25}{t}=25km/h\)

17 tháng 12 2021

- Giống nhau :

+ Đều là các chất khí không màu, không mùi ở nhiệt độ phòng.

+ Đều có chứa liên kết đôi, phân tử gồm 2 nguyên tử.

- Khác nhau : 

Tên chấtOxi \(\left(O_2\right)\)Lưu huỳnh monoxit \(\left(SO\right)\)
Kiểu chấtĐơn chấtHợp chất
Tính bềnBềnKhông bền, dễ bị oxi hoá thành lưu huỳnh đioxit (SO2)
Tính tan trong nướcTan ít trong nước

Phản ứng với nước tạo thành dd axit sunfoxylic (H2SO2)

Công thức cấu tạo\(O=O\)\(S=O\)
Công thức electron O : : O : : : : : : : : S : : O
Kiểu liên kếtCộng hoá trị không cựcCộng hoá trị có cực