A:take
B:taking
C:being take
D:have
The teacher asked the students to stop talking and ____ (listen) to her.
下列连线前后关系不正确的是
— Liu Xiang won the 110-meter hurdling gold at the 11th National Games again.
— He is always a super star in my heart. Congratulations to him.
一根轻质弹簧,当它在100N的拉力作用下,总长度为0.55m,当它在300N的拉力作用下,总长度为0.65m,则弹簧的自然长度为____ m.