题目

完形填空Humans are mammals (哺乳动物). Most mammals are born able to do many things.Some can walk within a few minutes of being born. They have to be able to run away if 1 is near. But human babies are born 2. They need the care of adults to live.In the first month of life, babies can not smile or sit up. They can not even hold up their own heads 3 some help from grown-ups.In the next few months, babies grow a lot. They learn to roll over, support their heads, and 4 sit up while being held.Babies also have to learn to use their 5. It takes months for them to learn to reach for objects.5．北京市2016年10月1日至7日国庆期间共接待游客11195000万人次，同比下降2.8%．将数据11195000用科学记数法表示应为（　　）A．11195×103B．1.1195×107C．11.195×106D．1.1195×106