Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Recently I have seen several air-crash. Therefore, I’d rather travel by …………….A.trainB.helicopterC.planeD.hot air balloon
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.With the existence of flying cars, I think there will be less traffic …………….in the future.A.carsB.jamC.vehicleD.road
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Do you know how to ……………a horse?A.rideB.driveC.sailD.fly
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Can you believe that ……………… cars already exist?A.driversB.driverC.drivingD.driverless
Kết quả phép tính $ {{\left( -\dfrac{2}{3} \right)}^{4}}:{{2}^{4}} $ làA. $ -\dfrac{1}{81} $ .B. $ \dfrac{1}{81} $ .C. $ -\dfrac{1}{9} $ .D. $ \dfrac{1}{9} $ .
Tổng các giá trị của $ x $ thỏa mãn $ {{\left( x\,+\,\dfrac{1}{2} \right)}^{2}}\,=\,\dfrac{4}{25} $ làA. $ \dfrac{9}{10} $ .B. $ -\dfrac{7}{10} $ .C. $ -1 $ .D. $ -\dfrac{3}{10} $ .
Giá trị $ x $ thỏa mãn $ {{2}^{x-1}}=\text{ }16 $ là A. $ 4 $ .B. $ 5 $ .C. $ 1 $ .D. $ 2 $ .
$ {{7}^{206}}-{{7}^{205}}+{{7}^{204}} $ chia hết cho A. $ 43 $ .B. $ 44 $ .C. $ 42 $ .D. $ 41 $ .
Chọn khẳng định đúng.So sánh $ {{3}^{222}} $ và $ {{2}^{333}} $ ta đượcA. $ {{3}^{222}}~ > \text{ }{{2}^{333}} $ .B.Không so sánh được.C. $ {{3}^{222}}=\text{ }{{2}^{333}} $ .D. $ {{3}^{222}}~ < \text{ }{{2}^{333}} $ .
Cho hai vectơ $ \overrightarrow{a} $ $ =\left( 2;4 \right), $ $ \overrightarrow{b} $ $ =\left( 5;3 \right). $ Tọa độ vectơ $ \overrightarrow{u}=2\overrightarrow{a}-\overrightarrow{b} $ là A.$ \left( 9;5 \right) $.B.$ \left( 7;7 \right) $.C.$ \left( 9;-11 \right) $.D.$ \left( -1;5 \right) $.
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