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2 năm trước
Cho 1 ống nghiệm, 1 bình nước đã biết khối lượng riêng, 1 cái thước. Hãy tìm cách để xác định: a, Khối lượng riêng của 1 chất lỏng nào đó b, Khối lượng riêng của 1 vật rắn nào đó (vật rắn này bỏ lọt vào ống nghiệm, không thấm nước)
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Read the following text carefully and choose the correct answer A,B,C,D for each of the gap When you are in Singapore , you can go about ( 1) .......... taxi , by bus or by underground .I myself prefer the underground ( 2) ............ it is fast ,easy and cheap . There are (3) ......... buses and taxis in Singapore and one cannot drive along the road (4) ....... and without many stops , especially on Monday morning . The underground is therefore usually quicker (5).......... taxis and buses . If you do not know Singapore very well, it is difficult (6)....... the bus you want . You can take a taxi , but it is (7) ............ expensive than the underground or a bus . On the underground , you find good maps that (8) ...... you the names of the stations and show you (9) ......... to get to them , so (10) ......... it is easy to find your way 1 A by B in C at D on 2 A but B because C when D so 3 A few B a lot C many D some 4 A quick B quickly C quicker D quickest 5 A so B like C than D as 6 A find B to find C finding D found 7 A less B more C most D much 8 A tell B told C tells D telling 9 A who B what C when D how 10 A how B that C when D where

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