已知，气体D的大量生产曾经解决了地球上因粮食不足而导致的饥饿和死亡问题，气体D和F反应可生成盐．气体D和A溶液反应生成白色沉淀．气体C为无色气体，气体E为红棕色气体．B溶液加入过量的F溶液能生成A溶液．

请回答下列问题：

已知向量$\overrightarrow{AB}$与$\overrightarrow{AC}$的夹角为${120}^{\circ }$,且$\left|\overrightarrow{AB}\right|=2,\left|\overrightarrow{AC}\right|=3$,若$\overrightarrow{AP}=\lambda \overrightarrow{AB}+\overrightarrow{AC}$,且$\overrightarrow{AP}\perp \overrightarrow{BC}$,则实数$\lambda$的值为(   ）

世界上国家和地区最多的大洲是（    ）

阅读下面短文，根据短文内容，从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。

    A GREAT basketball player will retire (退役) this week. His name is Kobe Bryant.

    Bryant, 1for the Los Angeles Lakers, a team in the NBA. He has been playing with the Lakers for 20 years. But now he is leaving because of2and injuries (伤).

    “My heart can take it, my mind can handle (处理) it,3 my body knows it's time to say goodbye,” he4in his poem (诗) Dear Basketball.

    Bryant is one of the greatest5in NBA. He has won five NBA championships (冠军) and two Olympic gold medals. He also has scored the third largest number of points in NBA history, even6than Michael Jordan.

    Bryant has a real love7basketball. He often starts to practice as8 as 5 am. Everybody knows how hard he works.

    Soon Bryant9 have some time to rest. But no matter (不管如何) what he does next, he said his love for basketball will10change.