已知⊙O的半径为4cm,A为线段OP的中点,当OP=7cm时,点A与⊙O的位置关系是 [ ]
A.点A在⊙O内
B.点A在⊙O上
C.点A在⊙O外
D.不能确定
答案:A
染色体根据着丝粒的位置分几种()
A.2种
B.3种
C.4种
D.5种
E.6种
句型转换(5分,每空0.5分)
Jack has carrots for lunch. (划线部分提问)
1 does Jack 2 for lunch?
Tom does sports every day. (改一般疑问句)
3 Tom 4 sports every day?
Is this a blue ruler?(作否定回答)
No, 5 6
Basketball is easy for me. (划线部分提问)
7 8 basketball for you?
She often calls her parents in the evening.(改写为否定句)
She 9 often 10 her parents in the evening.