Cho 4 điểm ABCD Viết phương trình mặt phẳng đi qua A và song song với mặt phẳng bcd

Vậy đáp án đúng là B.

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

  The latest addiction to trap thousands of people is Internet, which has been(31) ________ for broken relationships, job losses, financial ruin and even one suicide.Psychologists now recognize Internet Addiction Syndrome (IAS) as a new illnessthat could (32) ________ serious problems and ruin many lives.Special help groupshave been set up to offer sufferers help and support. IAS is similar to (33) ________ problems like gambling, smoking and drinking:addicts have dreams about Internet; they need to use it first thing in the morning; theylie to their partners about how much time they spend online; they wish they could cut down, bill are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet; although they felt guilty, they became depressed if they were (34) ________ to stop using it. Almost anyone can be at risk. Some of the addicts are teenagers who are already hooked on Computer games and who (35) ________ it very difficult to resist thegames on the Internet. Surprisingly, however, psychologists say that most victims are middle-aged housewives who have never used a computer before.

  Question 32:

• Tính chất hoá học đặc trưng của kim loại là:

• Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

  The latest addiction to trap thousands of people is Internet, which has been(31) ________ for broken relationships, job losses, financial ruin and even one suicide.Psychologists now recognize Internet Addiction Syndrome (IAS) as a new illnessthat could (32) ________ serious problems and ruin many lives.Special help groupshave been set up to offer sufferers help and support. IAS is similar to (33) ________ problems like gambling, smoking and drinking:addicts have dreams about Internet; they need to use it first thing in the morning; theylie to their partners about how much time they spend online; they wish they could cut down, bill are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet; although they felt guilty, they became depressed if they were (34) ________ to stop using it. Almost anyone can be at risk. Some of the addicts are teenagers who are already hooked on Computer games and who (35) ________ it very difficult to resist thegames on the Internet. Surprisingly, however, psychologists say that most victims are middle-aged housewives who have never used a computer before.

  Question 35:
  

• Cho a mol Mg tác dụng với dung dịch H­2SO4 loãng dư, thu được x mol H2. Cho a mol Al tác dụng với dung dịch H­2SO4 loãng dư, thu được y mol H2. Quan hệ giữa x và y là

• Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

  The latest addiction to trap thousands of people is Internet, which has been(31) ________ for broken relationships, job losses, financial ruin and even one suicide.Psychologists now recognize Internet Addiction Syndrome (IAS) as a new illnessthat could (32) ________ serious problems and ruin many lives.Special help groupshave been set up to offer sufferers help and support. IAS is similar to (33) ________ problems like gambling, smoking and drinking:addicts have dreams about Internet; they need to use it first thing in the morning; theylie to their partners about how much time they spend online; they wish they could cut down, bill are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet; although they felt guilty, they became depressed if they were (34) ________ to stop using it. Almost anyone can be at risk. Some of the addicts are teenagers who are already hooked on Computer games and who (35) ________ it very difficult to resist thegames on the Internet. Surprisingly, however, psychologists say that most victims are middle-aged housewives who have never used a computer before.

  Question 34:

• Cho kim loại X tác dụng với dung dịch H2SO4 loãng để lấy khí H2 khử oxit của kim loại Y (các phản ứng đều xảy ra). Hai kim loại X và Y lần lượt là:

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phases that best fits each of the numbered blanks from 34 to 38:

  People have always dreamt of living forever. Although we all know this will never happen, we will want to live as long as possible. __(34)__, there are advantages and disadvantages of a long life.In the first place, people who live longer can spend more time with their family and friends. Secondly, __(35)__ have busy working lives look forward to a long, relaxing life, when they can do the things they‘ve never had time for. __(36)__, there are some serious disadvantages. Firstly, many people become ill and consequently have to spend time in hospital or become burden __(37)__ the children and friends. Many of them find this dependence annoying or embarrassing. In addition to this, __(38)__ the fewer friends they seem to have because old friends die or become and it’s often difficult to make new friends. To sum up, living to a very old age is worthwhile for those who stay healthy enough to remain independent and enjoy life.

  Question 35:

• Tính chất hóa học đặc trưng của các kim loại là?

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phases that best fits each of the numbered blanks from 34 to 38:

  People have always dreamt of living forever. Although we all know this will never happen, we will want to live as long as possible. __(34)__, there are advantages and disadvantages of a long life.In the first place, people who live longer can spend more time with their family and friends. Secondly, __(35)__ have busy working lives look forward to a long, relaxing life, when they can do the things they‘ve never had time for. __(36)__, there are some serious disadvantages. Firstly, many people become ill and consequently have to spend time in hospital or become burden __(37)__ the children and friends. Many of them find this dependence annoying or embarrassing. In addition to this, __(38)__ the fewer friends they seem to have because old friends die or become and it’s often difficult to make new friends. To sum up, living to a very old age is worthwhile for those who stay healthy enough to remain independent and enjoy life.

  Question 34:

• Chia 2m gam hỗn hợp X gồm 2 kim loại có hoá trị không đổi thành 2 phần bằng nhau. Cho phần một tan hết trong dung dịch HCl (dư) thu được 2,688 lít H2 (đo ở đktc). Nung nóng phần hai trong oxi (dư) thu được 4,26 gam hỗn hợp oxit. Giá trị của m là: