蛇形路线驾驶操作，车辆在进口处挂低速挡，鸣笛起步。当车行驶到2号桩杆到轴距1/2处时

下列生物之间属于合作关系的是[ ]

A．草原中的狼和兔    

B．生活在豆科植物上的菟丝子    

C．稻田中的水稻和稗草    

D．蜜蜂采蜜

Can you imagine what life will be like in _______ time? [ ]

A. 20 years'

B. 20 year's

C. 20-years'

D. 20-years

绕过断层的方法用于断层落差较小的采煤工作面。

科学家再次发现曾经在新大陆普遍种植过的一种谷物每磅的蛋白质含量高于现在种植的作为主食的水稻、小麦等谷物。科学家宣称，种植这种谷物对人口稠密、人均摄入热量低和蛋白质来源不足的国家大有好处。
下面哪个，如果正确，对上述结论提出了最严重的质疑

A．新发现的农作物的每亩平均产量比目前的粮食作物产量低得多。
B．许多重要的粮食物作，如马铃薯最初都原产自新大陆。
C．每磅小麦的蛋白质的含量比大米的高。
D．新发现的农作物每磅产生的热量比目前的粮食作物要高。
E．全球的粮食供应只来自于20种粮食作物。

SOX is an alternative（1）for XML. It is useful for reading and creating XML content in a（2）editor. It is then easily transformed into proper XML. SOX was created because developers can spend a great deal of time with raw XML. For many of us, the popular XML（3）have not reached a point where their tree views, tables and forms can completely substitute for the underlying（4）language. This is not surprising when one considers that developers still use a text view, albeit enhanced, for editing other languages such as Java. SOX uses（5）to represent the structure ofan XML document, which eliminates the need for closing tags and a number of quoting devices. The result is surprisingly clear.

空白（4）处应选择（）

A.programming

B.command

C.markup

D.interactive