Who has the answer to the 2016 Jiangnan Ten High School Senior High School Students Sprint Entrance

The 2023 Jiangnan Ten Schools score line is as follows:

Science: 428 (3) points for one book, 367 (3) points for two books.

Liberal Arts: 495 (3) points for one book, 446 (3) points for two books.

Undergraduate batch: Art Class A: 401 points in Liberal Arts, 330 points in Science.

Category B: 335 points in Liberal Arts, 275 points in Science.

Arts C: 312 points in Liberal Arts, 257 points in Science.

In the 2023 "Jiangnan Ten Schools" Model Joint Entrance Examination, teachers, as instructors, play an important role in the cultivation of students' scientific thinking ability in high school biology teaching. With the continuous innovation of educational concepts, teachers are required to innovate teaching concepts.

However, in actual teaching, many teachers do not know how to implement the new teaching method, the classroom teaching mode is relatively old, and the indoctrination teaching mode is still adopted, and students are in a passive learning state, and the knowledge is memorized by rote.

In order to achieve good test results, teachers adopt the tactics of sea of questions, which makes students' thinking relatively narrow, which is not conducive to the cultivation of students' scientific thinking ability.

At the same time, biology is a discipline that focuses on experiments, but in specific teaching, students have fewer opportunities to participate in practical services, and teachers blindly inculcate theoretical knowledge in order to improve students' test scores, and students' ability to apply knowledge is insufficient.

The boring classroom learning atmosphere makes students' interest in learning decline, which affects the cultivation effect of students' scientific thinking ability. In the classroom, the interaction between teachers and students is insufficient, and teachers cannot find the deficiencies in teaching in time, so that the cultivation of students' scientific thinking ability cannot achieve the expected results.

Follow the cosine formula.

cosc = (a2+b 2-c 2) 2ab because a square + b square = 2c squared.

So. cosc=(a^2+b^2-(a^2+b^2)/2)/2ab=(a^2+b^2)/2/2ab=1/4(a/b+b/a)

Because it is a triangle with three sides, a and b are greater than zero.

So you can use mean inequalities.

cosc=1/4(a/b+b/a)≥1/4*2√(a/b*b/a)=1/2

The minimum value of cosc is 1 2

1. Cosine theorem: The square of either side of a triangle is equal to twice the sum of the squares of the other two sides minus twice the product of the cosine at the angle between these two sides and them, i.e.

2. Corollary: In ABC, if A2+B2=C2, then C is a right angle; If a2+b2 c2, then c is an acute angle; If a2+b2 c2, then c is an obtuse angle.

3. Other formulas:

Projective formula: 4. Application of the cosine theorem in solving triangles:

1) the two sides and the angles are known, and (2) the three sides are known.