问题
名词解释
根轨迹实轴上的会合点（或分离点）
答案
参考答案：
几条根轨迹在s平面上相遇后又分开（或分开后又相遇）的点，称为根轨迹的分离点（或会合点）。
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根轨迹实轴上的会合点（或分离点）
参考答案：
几条根轨迹在s平面上相遇后又分开（或分开后又相遇）的点，称为根轨迹的分离点（或会合点）。
A woman is going shopping. She is going 46 boat. The boat is going across（穿过）the river. Her basket is empty（空的）. Oh dear! Look! Her basket is in the 47 .“Help!”she says.“Look! My basket is in the river.” A boy sees the basket. He says, “Don’t worry! I can 48 it! I’m a very good swimmer.” He takes off his shoes and shirt. “Look 49 my shirt and shoes, please!” he says and then jumps into the river. A 50 sees the basket. “I can go by basket!” it thinks. It gets to the basket. The boy 51 in the river. “Where’s the basket?” he calls:“It’s over there!” calls the woman. “It’s behind you!” It’s 52 that duck! The boy gets to the basket.“Go away!” he says to the duck. The duck 53 out of the basket and swims away. The boy takes the basket to the land. “Oh, thank you!” says the woman. “Thank you very much!” “Not at all!” says the boy.“ 54 you like to give me my shirt and shoes?” “Yes, here you are. Oh, what’s in the basket? It’s the duck’s 55 .”
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