Explain that this is called DS, which is to let you solve a problem (whether the number of cars in function A exceeds the number of cars in function B).

Are the following conditions sufficient?

You also know that the number of cars that can be introduced into function A through the condition (1) is half of that of function B, that is, no more than.

However, condition (2) cannot deduce whether the number of cars in function A exceeds the number of cars in function B, which may be as many as A, as many as B and as many as B. ..

So a single condition (1) is enough, but a single condition (2) is not enough.

So choose a for this topic.

Since you also know that (1) can be introduced, why do you still think that (1) is not valid? In addition, this question is true or false, and there is no saying. What we care about is whether it is enough.