The first volume (60 points)

Matters needing attention

1. Before answering questions, candidates must clearly fill in their class, name and test number on the answer sheet and answer sheet with a black pen with a diameter of 0.5 mm. Please carefully approve the exam number, name and subject.

2. After choosing the answer for each question, black the answer label of the corresponding question on the answer sheet with 2B pencil. If you need to change it, clean it with an eraser, and then choose another answer label. The answer on the test paper is invalid.

3. There are *** 12 small questions in this paper, with 5 points for each small question and 60 points for * * *. Of the four options given in each question, only one meets the requirements.

I. (**60 points, 5 points for each small question)

1. If two straight lines are parallel to a plane, the positional relationship between the two straight lines is ().

A. parallel B. intersecting C. different planes D. above are possible

2. When three planes divide the space into seven parts, their intersection lines are as follows.

A. 1 Article B.2 Article C.3 Article D. 1 or Article 2

3. The equation of the straight line passing through the point (1, 0) and parallel to the straight line is

A.B. C. D。

Let sum be two different straight lines and a plane, then the following proposition is correct.

A. If,, then

B.if,, then

C. If,, then

D. If,, then

5. In the cube ABCD-A1b 1C1D1,where E and F are the midpoint of AB and B1C, respectively, the tangent of the angle between EF and plane ABCD is ().

A.2 B. 2 C. 12 D. 22

6. A square ABCD with a side length of A is AC folded along the diagonal △ADC. If ∠ dab = 60, the dihedral angle D-AC-B is ().

A. 60 BC to 90 BC

7. In the cube ABCD-A1B1C1D1,if E is the midpoint of A 1C 1, the straight line CE is perpendicular to ().

A.AC B. BD

C.A 1D D

8. If a straight line is perpendicular to both sides of a triangle on a plane; ② both sides of the trapezoid; ③ Two diameters of a circle; (4) The two sides of a regular hexagon can ensure that the straight line is perpendicular to the plane ().

A.①③ B. ② C. ②④ D. ①②④

9.BC is the hypotenuse of Rt△ABC, AP⊥ plane ABC and PD⊥BC are at point D, then the number of right triangles in * * * is ().

A.8 B. 7

C.6 D. 5

10. From the circle C: x2+y2+2x+4y-3 = 0 to the straight line x+y+ 1=0, the point * * has.

1。

1 1. Find the straight line passing through this point and make the distances to this point equal.

A.B.

C., or d, or

Give favorable comments. . . . . . . . . . . O(∩_∩)O~~