LUYỆN THI TNPT TEST 7 docx

... N 0 /64 Số hạt đã phân rã N 0 /2 3 N 0 /4 7 N 0 /8 15 N 0 /16 31 N 0 /32 63 N 0 /64 Tỉ lệ % đã rã 50% 75 % 87. 5% 93 .75 % 96. 875 % Tỉ lê đã rã và còn lại 1 3 7 15 31 63 Ứng dụng phóng xạ : Xác định ... chúng có cùng tính chất hóa học b. Khối lượng hạt nhân. Đơn vị khối lượng hạt nhân 1u = 12 1 khối lượng nguyên tử cacbon 12 6 C, 1u = 1,66055.10 - 27 kg m p = 1,0 072 76u...

Ngày tải lên: 06/10/2012, 08:49

... sewage. Clean water is now scarce, and we are at last beginning to respect this precious source. We should do something now. 41. One environmental problem in the world today is A. acid rain ... the world. a. variety b. changes c. conservation d. number 10. You are not _______ to say anything unless you wish to do so. a. obliged b. willing c. equal d. attracted 11. Many Vietnamese ......

Ngày tải lên: 23/07/2014, 16:20

... west to the Red Sea in the east .In fact ,the Sahara is almost as large as the United States .In this great desert ,. . . . . (43) . . . . temperatures can be scorching . The highest . . . . (44). ... forests are also very important to the world’s climate. The Amazon rain forest alone receives about thirty to forty percent of the total rainfall on the earth and products about the same perc...

Ngày tải lên: 23/07/2014, 16:20

... suddenly that c. such suddenly as d. so suddenly as 10.1 do not like ice cream ________ LUYỆN THI TNPT TEST 7 Choose the word which is stressed differently from the rest. 1. a. acquaintance ... you're not! a. Try not to say anything about your illness. b. Tell it to me if you are ill. c. If you are ill, you can say it. d. Don't pretend to be ill! 47. I deleted t...

Ngày tải lên: 02/08/2014, 01:20

... Environmental pollution thought to be one of the most serious problems. => are thought LUYỆN THI TNPT TEST 8 Choose the word which has the underlined part pronounced differently from the rest. ... usually has a set of rules within which a person has to obey in order to succeed in accomplishing the desired objective. These commonly agreed boundaries exist so as to test p...

Ngày tải lên: 02/08/2014, 01:20

... cancelled c. will be cancelling d. will have cancelled 27. We _______ much news of him since he _______ the LUYỆN THI TNPT TEST 7 Choose the word which is stressed differently from the ... most widely recognized organizations in the world, having won three Nobel Peace Prizes in 19 17, 1944, and 1963. 41. The text is about _______ a. a Swiss businessman, Henry Dunant b. the...

Ngày tải lên: 02/08/2014, 01:20