New Curriculum Reform of Steady Education 20 1 1 Looking for the answers to math test questions in Grade Two in May.

Answer a

The analysis of this topic mainly examines the operation of complex numbers, so the product of the real part and imaginary part of is equal to

2. answer d

The analysis of this topic mainly examines the judgment of the truth and falsehood of the proposition. Proposition is a true proposition, while in Proposition B, that is, the proposition is a false proposition, so it is a false proposition, so it is a true proposition, so it is both a false proposition and a true proposition.

Step 3 answer a

The analysis of this topic mainly examines the carry system. ,,,, so choose one.

Step 4 answer a

The analysis of this problem focuses on rational reasoning. Because,,, can be summarized from this, so choose a.

5. answer c

The analysis of this topic mainly investigates the application of the sum and difference formula of two angles of trigonometric function and the relationship between the roots and coefficients of the equation.

∴tanπ4=tan[(π4-α)+α]=-ba 1-ca= 1，

∴-ba= 1-ca,∴-b=a-c,∴c=a+b.

Step 6 answer C.

The analysis of this problem mainly investigates binomial expansion. Therefore, the minimum value of a positive integer is 7. So choose C.

7.answer b

Analysis of this topic mainly examines the basic ideas of independence testing. It can be seen from the conditions that the sum of the two classified variables is irrelevant.

8. Answer B Analysis This question mainly examines the relevant knowledge of sampling methods and probability. Through stratified sampling, we can know that we should choose 4 red balls, 3 blue balls, 2 white balls and 1 yellow ball, so the probability is.

9. answer d

The analysis of this topic mainly investigates the related knowledge of straight line and hyperbola. Set a point, because, because both point P and point A are on hyperbola, the eccentricity of hyperbola is obtained by subtracting two expressions. So choose D.

10. Answer C.

This topic analyzes and examines the use of derivatives to judge monotonicity and the application of monotonicity to compare the size.

It can be seen that when,, the function monotonically increases; When,,, the function monotonically decreases. So, there is. It is also a constant function, which obviously satisfies the meaning of the problem. At this time, ∴.

1 1. Answer-1

Analysis: This question examines the necessary and sufficient conditions for two straight lines to be perpendicular. Judging from the title, (a+2) A =- 1? a2+2a+ 1=(a+ 1)2=0,∴a=- 1.

12.

The analysis of this topic mainly investigates geometric probability. .

13.

The analysis of this topic mainly examines the knowledge of linear programming and the arc length formula of a circle. As shown in the figure, the plane area determined by the circle and inequality group can be known from the conditions, so it can be known that the arc length is.

14.

The analysis of this problem examines the operation of spatial vectors and the ability of spatial imagination.

As shown in the figure, when the point is in the triangular prism ACD-a1c1d1.

Internal and boundary operations; When the point is in a triangular prism.

B1BC1-a1ad1runs inside and on the boundary. The protruding parts of these two triangular prisms

It is divided into tetrahedron C 1-A 1A 1, and the volume is easily obtained.

15. Answer 1005

The analysis of this topic mainly examines the knowledge of the general term and sum of series. The sequence is: 1, 1,-1, 2, 2, 3, -2, 4, 3, 5, -3, 6, so = 1005.

16. This topic examines the identity transformation of plane vector triangle and the basic operation of plane vector.

Solution: (1),

When,;

When? Six points for ...............................

(2) For any real number, it holds, that is,

For any real number, hold, that is, for any real number, hold,

So or, the solution is either .................. 12.

17. This topic mainly examines the probability of independent repeated events, the probability of opposing events, and the distribution list and expected knowledge of discrete random variables.

Solution: (1) The frequency of illegal driving is, and the percentage of drunk driving in illegal driving is. ..... 2 points

All possible values of (2) are: 0, 1, 2, 3, 4 ... 3 points.

The distribution list is

0 1 2 3 4

Nine points

(3) The probability that at least one person has a traffic accident is

= 0.983616 .............................12.

18. This topic mainly examines the program block diagram, the solution of the general term of the series, and the summation of the series.

Solution: According to the block diagram, 2 points.

Is arithmetic progression, if the tolerance is set to, then there is.

............................., 4 points.

(1) Know the time, time,

Solution .................... 8 points.

Therefore, 9 points.

(2) Starting from (2):

.................... 12 point

19. This topic mainly examines the knowledge of three views, the solution of a pyramid volume, the determination of the perpendicularity of a straight line, and the solution of a dihedral angle.

Solution: (1) According to the three views, the bottom of the quadrangular pyramid is a square with a side length of 1

The underside of the side. ∴,

That is, the volume of the four pyramids is 4 points.

(2) No matter where the point is, it exists.

The proof is as follows: the link is a square.

* Flat bottom, ∴.

Here comes the plane again.

No matter where the point is, there is a plane. ..

No matter where the point is, it has eight points.

(iii) Connection points on the plane.

∵ , , ,

∴Rt△ ≌Rt△，

So delta delta, ∴.

∴ is the plane angle of dihedral angle.

At rt delta,

Similarly, in delta, it is obtained by cosine theorem.

∴, that is, the size of dihedral angle is ................................. 12.

20. solution: this question mainly examines the knowledge of using derivatives to find the slope of the tangent of the curve and the positional relationship between the straight line and the conic curve.

(1) ...................1min.

set up

Then the equation of this straight line is

Similarly, the equation of a straight line can be obtained as follows

Seven points

(2) by

Know from the title

................... 10 point

Distance from point p to straight line

That is, the area of △MNP is a fixed value of 2. .................... 13 o'clock

2 1. This topic mainly examines the knowledge of using derivatives to judge the monotonicity of functions, to find the maximum value of functions, and to find the range of parameters.

Solution: ①

........................, two points.

When, when,

∴ Decrease on the list and monotonously increase on the list.

∴

② 5 points.

If it increases monotonously in the world, it also holds true in the world.

Permanent facilities

Orders, and then,

∴

If it is reduced in the previous order, it will be established in Shanghai.

Constantly build, and