An exercise of computer level 2 C language, 16. The following statement about the use of C language data type is wrong: A. To represent natural numbers accurately, use integer type B. To save data with multiple decimals, use the double type C. If you want to process related data with different types, such as personnel information, you should customize the structure type D. If only true and false logical values are handled, logical types should be used I chose B

There is no such logic value as true or false in C language

A = 2, B = 3, C = 4, then what is the value of the expression a + b > C & & B = = C & & a | B + C & & B + C

(a + b > C) & amp; (b = = C) & amp; (a) | (B + C) & amp; (B + C) parentheses added according to operator priority (a + b > C) = = 1; (b = = C) = = 0; (a) = = 1; (B + C) = = 1; (B + C) = = 1; the result is 1 & amp; 0 & amp; 1 | - 1 & amp; 1 = = 1

On the application of cylinder surface area in primary school
The columns on both sides of the gate of the children's Palace are 4 meters high and 60 cm in diameter at the bottom. During the construction, stainless steel sheets of 2 meters long and 1 meter wide are used to wrap the columns. How many stainless steel sheets should be used for each column at least
In fact, it's not very difficult, but I don't know how many bottom, please give me a complete formula, if you are the one!
It's a cylinder. It's divided. OK?

This problem is to find out how many times the side area of the cylinder is the area of the iron sheet
Bottom diameter: D = 60cm = 0.6m
Perimeter of bottom surface: C = 3.14 * 0.6 = 1.884 (m)
Cylinder side area: S1 = 1.884 * 4 = 7.536 (M2)
Iron sheet area: S2 = 2 * 1 = 2 (m)
Sheet number: n = 7.536/2 ≈ 4 (sheet)
A: at least four colored papers are required

Ten identical rectangles are combined into a rectangle with an area of 30 square centimeters (as shown in the figure), and the perimeter of the large rectangle is calculated

Where is the picture

3.1 times 10 to the fifth power. What's the exact number? What's the significant number? 1.61 times 10 to the fourth power?

(1) Accurate to 10000 digits, two significant digits
(2) 100. Effective 3

It takes 26 seconds for the train to pass through a 256 meter long tunnel (i.e. from the front entrance to the rear exit). At this time, it takes 16 seconds for the train to pass through a 96 meter long tunnel. Find the length of the train

Suppose the length of the train is x meters, from the meaning of the question: 256 + X 26 = 96 + x 16, the solution is: x = 160, answer: the length of the train is 160 meters

The perimeter of △ ABC is 100cm, as shown in the figure AE / AB = AF / AC = EF / BC = 3 / 5, and the perimeter of △ AEF is 100cm________

The perimeter of △ AEF is = AE + AF + EF
=3/5AB+3/5AC+3/5BC
=3/5(AB+AC+BC)
=3/5*100
=60cm

How many kilometers is 4.3 light years

One light year = 3 * (10 ^ 8) * 365 * 24 * 60 * 60 is approximately equal to the 12th power kilometer of 9.5 * 10

Jingjing is 23 years younger than her mother, and her father is 3 years older than her mother. The total age of the three is 73. How old is Jingjing

Age of Jingjing: [73-23 - (23 + 3)] 3 = 8 (years)
Draw a line diagram:
Dad: 23 + 3 years old|
Mom: I'm 23 years old|
Jingjing: | --|
The three parts are equal after subtracting the age difference

It is known that in ladder ABCD, ad ‖ BC, m and N are the midpoint of BD and AC respectively (as shown in the figure)

(1) It is proved that: connect am and extend, intersect BC at point E (as shown in Figure 2), ∵ ad ∥ BC, ∵ dam = ∵ BEM, ∵ ADM = ≌ EBM (AAS), ∵ am = me, ad = be, ∵ m, n are the midpoint of AE and AC respectively,