下列不是2013年国家最高科学技术奖的获得者的是哪位科学家（）
A、张存浩
B、袁隆平
C、程开甲
参考答案：B
The doctor ______ Mrs. Black carefully and told her nothing was wrong with her. [ ]
A. looked up
B. looked over
C. looked for
D. looked like
IP地址由四个小数点分开的16位二进制组成。 （ ）
