[填空题] 目前国内科技对经济的贡献率约为（）。

下面做法不正确的是（）。 ["禁止婴儿在有光滑的地面、台阶、玻璃等材料的场地嬉戏","可以带婴儿到动物园的各种动物前玩弄动物","禁止婴儿拿超市的颗粒样食物塞入口中以防窒息","禁止婴儿攀爬自动扶梯和护栏"] 我国第一个安全生产月始于哪一年？主题是什么？ A Windows Communication Foundation (WCF) service only accepts messages that are signed and encrypted. A client application is not receiving expected responses from the service. You need to enable logging to verify that the messages from the client are signed and encrypted. You also need to see what each message looks like before the message body is deserialized into a NET object. What should you do?（） ["","","",""] 人身保险与储蓄的比较？ 以下方法，不能提高抗拔桩的抗拔承载力的是（） ["扩大桩端","增加桩长","增大桩径","缩小桩径"] 目前国内科技对经济的贡献率约为（）。