1, C(A, d is the initial formation stage, b is the initial formation stage) is the main sign of stable nucleus formation; Common goal, correct collective public opinion and the formation of class spirit.

2, c (forget it, it's simple)

3, a (not paying attention at will = not paying attention, there is no predetermined goal, and no effort is needed. What is to be distinguished here is the concern after leisure, which has a predetermined purpose, but does not require effort)

4, a (proactive inhibition is the influence of what you learned before on what you learned later, and it is a negative influence, inhibition, so it is a positive and negative transfer)

5. D (It is a re-engineering project, so there are many topics. In fact, these options are not confusing at all. It must be D)

There is nothing to say about this. Is that a hungry cat? )

7.b (Personality in middle school is self-identity and role confusion)

8, D (middle school students still have some concrete thinking) I checked this again: the development of thinking power has the following two main characteristics: first, abstract logical thinking has begun to dominate, but it still belongs to experience, and their logical thinking needs the direct support of perceptual experience, that is, image thinking still plays an important role; Second, the independence and criticism of thinking have developed significantly. They often like to doubt and argue, and don't believe the conclusions of teachers and books casually.

Is the answer perfect ~