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tienphuchd
2 năm trước
Có hỗn hợp hai khí CO và CO2. Nêu phương pháp hóâ học để chứng minh sự có mặt của hai khí đó. Viết các phương trình hóa học.
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During the (31) ________ years, many young people can at times be difficult to talk to. They often seem to dislike being questioned. They may seem (32) _______ to talk about their work at school. This is a normal (33) _______ of this age. Though it can be very hard for parents to understand, it is part of becoming (34) ________ of teenagers trying to be adult while they are still growing up. Young people are usually unwilling to talk if they believe, that questions are trying to (35) ________ up on them Parents should do their (36) _______ to talk to their son and daughter about school, work and future plans but should not (37) ________ them to talk if they don't want to. Parents should also watch for danger signs. Some young people in trying to be adult may (38) ________ with sex, drugs, alcohol or smoking. Parents need to watch for any signs of (39) ________ behavior which may be connected with these and help if (40) ________. 31. a. early b. teenage c. childhood d. recent 32. a. unworried b. unrestrained c. unexpected d. unwilling 33. a. development. b. appearance c. circumstance d. achievement 34. a. free b. confident c. dependent d. independent 35. a. catch b. check c. keep d. make 36. a. well b. good c. better d. best 37. a. push b. allow c. put d. expect 38. a. experiment b. approach c. experience d. attach 39. a. unacceptable b. unusual c. normal d. exemplary 40. a. proper b. appropriate c. important d. necessary

During the (31) ________ years, many young people can at times be difficult to talk to. They often seem to dislike being questioned. They may seem (32) _______ to talk about their work at school. This is a normal (33) _______ of this age. Though it can be very hard for parents to understand, it is part of becoming (34) ________ of teenagers trying to be adult while they are still growing up. Young people are usually unwilling to talk if they believe, that questions are trying to (35) ________ up on them Parents should do their (36) _______ to talk to their son and daughter about school, work and future plans but should not (37) ________ them to talk if they don't want to. Parents should also watch for danger signs. Some young people in trying to be adult may (38) ________ with sex, drugs, alcohol or smoking. Parents need to watch for any signs of (39) ________ behavior which may be connected with these and help if (40) ________. 31. a. early b. teenage c. childhood d. recent 32. a. unworried b. unrestrained c. unexpected d. unwilling 33. a. development. b. appearance c. circumstance d. achievement 34. a. free b. confident c. dependent d. independent 35. a. catch b. check c. keep d. make 36. a. well b. good c. better d. best 37. a. push b. allow c. put d. expect 38. a. experiment b. approach c. experience d. attach 39. a. unacceptable b. unusual c. normal d. exemplary 40. a. proper b. appropriate c. important d. necessary

During the (31) ________ years, many young people can at times be difficult to talk to. They often seem to dislike being questioned. They may seem (32) _______ to talk about their work at school. This is a normal (33) _______ of this age. Though it can be very hard for parents to understand, it is part of becoming (34) ________ of teenagers trying to be adult while they are still growing up. Young people are usually unwilling to talk if they believe, that questions are trying to (35) ________ up on them Parents should do their (36) _______ to talk to their son and daughter about school, work and future plans but should not (37) ________ them to talk if they don't want to. Parents should also watch for danger signs. Some young people in trying to be adult may (38) ________ with sex, drugs, alcohol or smoking. Parents need to watch for any signs of (39) ________ behavior which may be connected with these and help if (40) ________. 31. a. early b. teenage c. childhood d. recent 32. a. unworried b. unrestrained c. unexpected d. unwilling 33. a. development. b. appearance c. circumstance d. achievement 34. a. free b. confident c. dependent d. independent 35. a. catch b. check c. keep d. make 36. a. well b. good c. better d. best 37. a. push b. allow c. put d. expect 38. a. experiment b. approach c. experience d. attach 39. a. unacceptable b. unusual c. normal d. exemplary 40. a. proper b. appropriate c. important d. necessary

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