There are many ways for us to learn English. Different people have different ways. But I think the best way to learn English is1it. Do you 2 with me?

    Listening, speaking, reading and writing are all very3 in learning English. So we should learn the four English skills. While learning English, we need to4 many words, grammar(语法)rules and know about 5cultures. Some people learn English by listening to the 6 or watching TV. They try to 7 English with their friends every day. You don't need to care how badly you speak. The more you speak, the better your English will become. Some people go to the English corner to 8English. They also read English storybooks very often. When they meet a new word，they will look it up (查阅) in 9 You should also practice 10 in English every day.

    Keep trying and working hard to improve your English.

据清《养吉斋丛录》载：“凡军机大臣，止准在军机处承本日所奉谕旨；部院稿案，不准在军机处办理；司员不准至军机处启事，军机章京办事处，不许闲人窥视；王以下及文武大臣，不许至军机处与军机大臣谈论。”材料体现了军机处的特点是

已知向量$\overrightarrow{a}$=(2,1),$\overrightarrow{b}$=(3,λ)，若$\overrightarrow{a}$$\perp$$\overrightarrow{b}$，则λ=____