概率方差D(X)公式简介:Brother Qin, let's go quickly. This Japanese army is at least the size of a division, with 20,000 to 30,000 people. We must rush back to the stronghold as soon as possible and be prepared to face the enemy, otherwise we will suffer heavy losses!
Brother Qin, let's go quickly. This Japanese army is at least the size of a division, with 20,000 to 30,000 people. We must rush back to the stronghold as soon as possible and be prepared to face the enemy, otherwise we will suffer heavy losses!