A. 18 v\u0129\u00a0B\u1eafc. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0C.\u00a017 \u0111\u1ed9 v\u0129 B\u1eafc.<\/p>\n<\/div>\n
B. 16 \u0111\u1ed9 v\u0129B\u1eafc\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 D.\u00a015 \u0111\u1ed9 v\u0129 B\u1eafc.<\/p>\n<\/div>\n
C\u00e2u 14. \u0110ai nhi\u1ec7t \u0111\u1edbi gi\u00f3 m\u00f9a \u1edf mi\u1ec1n B\u1eafc ph\u00e2n h\u00f3a \u1edf \u0111\u1ed9 cao<\/b><\/div>\n<\/div>\n
A.600 \u2013700m.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C.650 \u2013 1000m.<\/span><\/div>\nB.900 \u20131000m.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D.600 \u2013 800m.<\/span><\/div>\n<\/div>\n
C\u00e2u 15. S\u1ed1\u00a0<\/b><\/span>l\u01b0\u1ee3ng c\u00e1c con s\u00f4ng c\u00f3 chi\u1ec1u d\u00e0i tr\u00ean 10km l\u00e0<\/b><\/div>\nA. 2379 s\u00f4ng .\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b>C.2360 s\u00f4ng.<\/span><\/div>\nB. 2630 s\u00f4ng.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D.3620 s\u00f4ng.<\/span><\/div>\n<\/div>\n
C\u00e2u 16. Nguy\u00ean nh\u00e2nkhi\u1ebfn \u0111\u1ea5t Feralit c\u00f3 m\u00e0u \u0111\u1ecf v\u00e0ng do<\/b><\/span><\/div>\nA. S\u1ef1 r\u1eeda tr\u00f4i c\u1ee7a c\u00e1c baz\u01a1 d\u1ec5 tan nh\u01b0 Ca+ <\/sup>, K , M+<\/sup>.<\/span><\/div>\nB. S\u1ef1 t\u00edch t\u1ee5 \u00f4xit s\u1eaft ( Fe2O3).<\/span><\/div>\nC. S\u1ef1 t\u00edch t\u1ee5 \u00f4xit nh\u00f4m ( Al2O3).<\/span><\/div>\nD. S\u1ef1 t\u00edch t\u1ee5 \u00f4xits\u1eaft ( Fe2O3) v\u00e0 \u00f4xit nh\u00f4m ( Al2O3).<\/span><\/div>\n<\/div>\n
C\u00e2u 17. C\u1ea3nh quan \u0111\u1ecba\u00a0<\/b><\/span>l\u00ed mi\u1ec1n Nam l\u00e0<\/b><\/span><\/div>\nA. c\u1ea3nh quan \u0111\u1edbi r\u1eebng nhi\u1ec7t \u0111\u1edbi gi\u00f3 m\u00f9a.<\/span><\/div>\nB. c\u1ea3nh quan \u0111\u1edbi r\u1eebng c\u1eadn nhi\u1ec7t \u0111\u1edbi.<\/span><\/div>\nC. c\u1ea3nh quan \u0111\u1edbi r\u1eebng x\u00edch \u0111\u1ea1o.<\/span><\/div>\nD. c\u1ea3nh quan \u0111\u1edbi r\u1eebng\u00a0<\/span>c<\/span>\u1eadnx\u00edch \u0111\u1ea1o.<\/div>\n<\/div>\n
C\u00e2u 18. Nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m: H\u01b0\u1edbng v\u00f2ng cung c\u1ee7a \u0111\u1ecba h\u00ecnh, \u0111\u1ed3i n\u00fai th\u1ea5p, \u0111\u1ecba h\u00ecnh cacxt\u01a1, \u0111\u1ed3ng b\u1eb1ng m\u1edf r\u1ed9ng, nhi\u1ec1u v\u1ecbnh, \u0111\u1ea3o v\u00e0 qu\u1ea7n \u0111\u1ea3o, l\u00e0 c\u1ee7a mi\u1ec1n t\u1ef1 nhi\u00ean<\/b><\/span><\/div>\nA. mi\u1ec1n \u0110\u00f4ng B\u1eafc v\u00e0 B\u1eafc Trung B\u1ed9.<\/span><\/div>\nB. mi\u1ec1n T\u00e2y B\u1eafc v\u00e0 B\u1eafc Trung B\u1ed9.<\/span><\/div>\nC. Nam Trung B\u1ed9.<\/span><\/div>\nD. Nam B\u1ed9.<\/span><\/div>\n<\/div>\n
C\u00e2u 19. \u0110\u1eb7c \u0111i\u1ec3m \u0111\u1ecba h\u00ecnh nhi\u1ec7t \u0111\u1edbi \u1ea9m gi\u00f3 m\u00f9a th\u1ec3 hi\u1ec7n r\u00f5 n\u00e9t qua<\/b><\/span><\/div>\n<\/div>\n
A. Cacxto \u0111\u00e1 v\u00f4i.<\/span><\/div>\nB. x\u00e2m th\u1ef1c m\u1ea1nh \u1edf v\u00f9ng \u0111\u1ed3i n\u00fai.<\/span><\/div>\nC. phong h\u00f3a v\u1eadt l\u00ed.<\/span><\/div>\nD. phong h\u00f3a h\u00f3a h\u1ecdc.<\/span><\/div>\n<\/div>\n
C\u00e2u 20. Di\u1ec7n t\u00edch r\u1eebng hi\u1ec7n nay t\u0103ng nh\u01b0ng ph\u1ea7n l\u1edbn r\u1eebng n\u01b0\u1edbc ta l\u00e0 <\/b><\/span><\/div>\nA. r\u1eebng gi\u00e0u<\/span><\/div>\nB. r\u1eebng trung b\u00ecnh.<\/span><\/div>\nC. r\u1eebng ngh\u00e8o.<\/span><\/div>\nD. r\u1eebng non m\u1edbi ph\u1ee5c
\nh\u1ed3i v\u00e0 r\u1eebng m\u1edbi tr\u1ed3ng.<\/span><\/div>\n<\/div>\n
C\u00e2u 21. Nguy\u00ean nh\u00e2nd\u1eabn \u0111\u1ebfn t\u00e0i nguy\u00ean r\u1eebng n\u01b0\u1edbc ta b\u1ecb gi\u1ea3m s\u00fat nghi\u00eam tr\u1ecdng\u00a0<\/b><\/span><\/div>\n<\/div>\n
A. do \u0111\u1ed1t n\u01b0\u01a1ng l\u00e0m r\u1eaby c\u1ee7a \u0111\u1ed3ng b\u00e0o c\u00e1c d\u00e2n t\u1ed9c v\u00f9ng cao.<\/span><\/div>\nB. do ch\u00e1y r\u1eebng.<\/span><\/div>\nC. do h\u1eadu qu\u1ea3 chi\u1ebfn tranh.<\/span><\/div>\nD. do khai th\u00e1c b\u1eebab\u00e3i, kh\u00f4ng theo m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c nh\u1ea5t \u0111\u1ecbnh.<\/div>\n