Water is vital for our survival and for producing food. It takes about a thousand tons of water to produce one tone of grain that, fed to cows, produces only 18 pounds of meat. Today mankind is using about 160 billion tons more water each year than is being replenished by rain and fed back into water storages. If this water were carried in water trucks, it would require a 300, 000-mile-long convoy of trucks every day—a convoy length 37 times the diameter of the Earth. This is how much water we are using and not replenishing.

[填空题]____

[单选题]下列海上灾难与海上运输有关系的是（）

[单选题]根据《中国电信DNS系统组网规范（2011版）》，（）由网络设备组成，用于实现DNS节点内各服务器的网络接入、安全控制和流量负载均衡等功能。

[单选题]从所给的四个选项中，选择最合适的一个填入问号处，使之呈现一定的规律性：

[单选题]下列哪项不属于远程交付前的活动（）

[单选题]控显转换箱故障时，应急处理方法为（）

[判断题]使用了站点主题的网页也能对背景进行编辑。

[判断题]平衡树一定是丰满树。

[多选题]在ASP中，Request对象所包含的方法是？（）

[单选题]O2通过液相弥散的速度为CO2的（）

[问答题]Water is vital for our survival and for producing food. It takes about a thousan...

[问答题]Water is vital for our survival and for producing food. It takes about a thousan...

[问答题]Water is vital for our survival and for producing food. It takes about a thousan...

[单选题]These decisions will have a vital（）on their attitude towards the West.

[填空题]VPC（Vital Platform Computer）指（）。

[填空题]VPC（Vital Platform Computer）指（）。

[单选题]In NAVTEX service, VITAL warnings will（）by transmitting station.

[单选题]Repair of vital machinery and services on a ship should be accomplished（）.

[单选题]Which of the following commands will list vital product data for all hardware co...

[单选题]NAVTEX系统播发电报优先次序的标志是（）。①VITAL；②IMPORTANT；③ROUTINE；④URGENT；⑤SAFETY；⑥MAYDAY