What is the text of Lesson 19 in the fifth grade volume I of PEP? In five minutes, I forgot to bring my Chinese book with me

What is the text of Lesson 19 in the fifth grade volume I of PEP? In five minutes, I forgot to bring my Chinese book with me

How to write the exercises on page 72 of Chinese book in the sixth grade volume I of PEP

I read such a cartoon in a comic book: in a big forest, a man with a cigarette in his mouth and a sharp axe cut down big trees, and the trees were crying. A woodpecker stopped on the man's shoulder. The woodpecker looked at the man's head and said, "there must be insects in this section of wood." no

New words in unit 1 of PEP Chinese book

Don't you just buy a book? You can read whatever you want!

Three integers a, B, C satisfy ABC = 24, find the maximum and minimum of a + B + C

26 9

A. B is 60 kilometers apart. One car starts from a to B at the speed of 70 kilometers per hour, and the other car starts at the speed of 55 kilometers per hour
The speed of KM starts from B, and the two trains go in the same direction at the same time. After a few hours, the express train catches up with the local train?

60 ÷ (70-55) = 4 hours

One fifth of a number is 0.15 greater than 2% of 18.5. What's the number? How to find it?

Formula: 5 × (18.5 × 2% + 0.15) = 2.6

A 180 meter long train runs in the same direction with a at the speed of 60 km / h. The Train catches up with car a until it meets car B, with an interval of 5 minutes. If it takes 30 seconds for the train to catch up with car a and 6 seconds for the train to meet car B and leave, how many minutes will car B meet car a after meeting the train? The formula is not an equation

=(180 / 6 × 3.6 × 5) / (180 / 6 × 3.6-60 + (60-180 / 30 × 3.6)) - 5 = 1.25 minutes

Given that the sum of (2 / 3) x ^ 3m-1y ^ 3 and - (1 / 4) x ^ 5 y ^ 2n + 1 is a monomial, then a ^ 2B ^ n + A ^ m + n B-2 is____ Times____ Item form

Because the sum of (2 / 3) x ^ (3m-1) y ^ (2n + 1) and - (1 / 4) x ^ 5Y ^ (2n + 1) is monomial, they are of the same kind, and the exponents of the same letters are equal, so: 3m-1 = 5 and 2n + 1 = 3M = 2, n = 1, so: A & # 178; B ^ n + A ^ (M + n) B-2 = A & # 178; B & # 185; + A ^ (2 + 1) B-2 = A & # 178; B + A & # 179; b-2a & # 178; B

A batch of cement weighs 50 tons. 20% of the total amount is used in the first time. Half of the tons are used in the second time. How many tons are left?

Remaining: 50 × (1-20%) - 1 / 2 = 39.5 tons

In the triangle ABC, the angle a = 50 degrees, AC.AB When the vertical bisectors on both sides intersect at point O, what is the degree of the angle BOC?
In the triangle ABC, the angle a = 50 degrees, AC.AB When the vertical bisectors on both sides intersect at point O, what is the degree of the angle BOC?

The angle of the center of the circle is twice that of the circumference of the same arc