Trong không gian với hệ tọa độ Oxy, cho hai đường thẳng d 1 : x = 2 + t y = 1 − t z = 2 t  và d 2 : x = 2 − 2 t y = 3 z = t . Khoảng cách từ điểm  M − 2 ; 4 ; − 1  đến mặt phẳng cách đều hai đường thẳng d 1  và d 2 là:

A. 15 15

B. 2 15 15

C. 30 15

D. 2 30 15

Read the following passage and choose the best answer for each blank. Romantic Feelings of Teenss Mature! Process

Teens face strong pressures to date, as well as get involved in a romantic relationship. A romantic relationship is one that involves feelings of (26)______. In fact, over half of teens in the United States report dating regularly (casual dates with one or more partners at different times) whereas a third claim to have a steady dating partner. Young teens usually hang out with friends who are the same (27) ______ as they are. As they reach the mid-teen years (age 14-15 years), they start having relationships with friends of the opposite sex. Such relationships are likely to be friendships or physical attractions. Although most romantic relationships among 12- to 14-year-olds (28)  ______less than 5 months, by age 16 relationships last an average of  2 years. In the early teen years, dating is more superficial – for fun and (29) ______. In the older teen years, youth are looking for intimacy, companionship, affection, and (30) ______ support. Desiring a romantic partner is a natural, expected part of (31) ______. However, involvement in a serious or exclusive romantic relationship in the early teen years can  (32) ______problems. True romantic relationships are about intimacy, or communicating detailed, personal information verbally, and physical contact and closeness. Some believe a teen first needs to form an identity and know who she or he is (33) ______ developing a healthy intimate relationship. Other experts feel that romantic relationships are a way for teens to learn more about (34) ______. Many young teens are still defining themselves and romantic relationships may be based on a (35) ______sense of intimacy - in other words, teens don't know themselves well enough to share who they are with someone else.

Question 32:

A. create

B. impress

C. get

D. succeed

Tìm  l i m 2 n + 1 n + 1

A. 1

B. 2

C. 3

D.  2

Tính bằng cách thuận tiện nhất

a. 1 235 + 206 + 794 + 265= …………

b. 672 + 405 + 595 = ............................

Read the following passage and choose the best answer for each blank. Romantic Feelings of Teenss Mature! Process

Teens face strong pressures to date, as well as get involved in a romantic relationship. A romantic relationship is one that involves feelings of (26)______. In fact, over half of teens in the United States report dating regularly (casual dates with one or more partners at different times) whereas a third claim to have a steady dating partner. Young teens usually hang out with friends who are the same (27) ______ as they are. As they reach the mid-teen years (age 14-15 years), they start having relationships with friends of the opposite sex. Such relationships are likely to be friendships or physical attractions. Although most romantic relationships among 12- to 14-year-olds (28)  ______less than 5 months, by age 16 relationships last an average of  2 years. In the early teen years, dating is more superficial – for fun and (29) ______. In the older teen years, youth are looking for intimacy, companionship, affection, and (30) ______ support. Desiring a romantic partner is a natural, expected part of (31) ______. However, involvement in a serious or exclusive romantic relationship in the early teen years can  (32) ______problems. True romantic relationships are about intimacy, or communicating detailed, personal information verbally, and physical contact and closeness. Some believe a teen first needs to form an identity and know who she or he is (33) ______ developing a healthy intimate relationship. Other experts feel that romantic relationships are a way for teens to learn more about (34) ______. Many young teens are still defining themselves and romantic relationships may be based on a (35) ______sense of intimacy - in other words, teens don't know themselves well enough to share who they are with someone else.

Question 31:

A. Teenage

B. teens

C. adolescent

D. adult

Đặt tính rồi tính

a. 450 376 + 6 849

b. 546 327 – 30 839

Read the following passage and choose the best answer for each blank. Romantic Feelings of Teenss Mature! Process

Teens face strong pressures to date, as well as get involved in a romantic relationship. A romantic relationship is one that involves feelings of (26)______. In fact, over half of teens in the United States report dating regularly (casual dates with one or more partners at different times) whereas a third claim to have a steady dating partner. Young teens usually hang out with friends who are the same (27) ______ as they are. As they reach the mid-teen years (age 14-15 years), they start having relationships with friends of the opposite sex. Such relationships are likely to be friendships or physical attractions. Although most romantic relationships among 12- to 14-year-olds (28)  ______less than 5 months, by age 16 relationships last an average of  2 years. In the early teen years, dating is more superficial – for fun and (29) ______. In the older teen years, youth are looking for intimacy, companionship, affection, and (30) ______ support. Desiring a romantic partner is a natural, expected part of (31) ______. However, involvement in a serious or exclusive romantic relationship in the early teen years can  (32) ______problems. True romantic relationships are about intimacy, or communicating detailed, personal information verbally, and physical contact and closeness. Some believe a teen first needs to form an identity and know who she or he is (33) ______ developing a healthy intimate relationship. Other experts feel that romantic relationships are a way for teens to learn more about (34) ______. Many young teens are still defining themselves and romantic relationships may be based on a (35) ______sense of intimacy - in other words, teens don't know themselves well enough to share who they are with someone else.

Question 30:

A. sociable

B. social

C. society

D. sociably