椭圆的短轴长为2,长轴是短轴的2倍,则椭圆的中心到其准线的距离是
根据句意和所给的中文提示,写出句子中的单词。
1. Everyone else in my class was invited ______( 除了) me, and I don’t know why.
2. Doing lots of listening practice is one of the ______(秘诀) of becoming a good English learner.
3. Please come over to my office tomorrow morning to______(讨论) our new plan.
4. Did you use to get______(紧张的) when you see the school report from your teacher?
5. Do you know what your _______(父母的) favorite colors are?
法乐氏四联症()
A.右室增大
B.肺血增多
C.两者均有
D.两者均无