结合所学知识，请简要回答：
金属钛（Titanium）是航空、军工、电力等方面的必需材料，因为具有奇特的性能，被誉为“未来金属”。金属钛的元素符号是 （ ）
This is a1of Robert’s family. This man is Mr. King. He is Robert’s father. This woman is Mrs. King. She is Robert’s2. Who are this boy and this girl?3 boy is Tommy, Mr. King’s 4. And the girl is Anna, Mr. King’s daughter. Tommy and Anna are brother and sister. 5 are in the same (相同的) class. They have a happy 6.
1912年3月，孙中山以临时大总统名义颁布____ ，要求限期剪去辫子，去除旧俗。
