The role those anthropologists ______ to evolution is not of dictating the details of human behavior but one of imposing constraints.

The motion of ocean water ______ at different depths be...

单项选择题The motion of ocean water ______ at different depths below the surface.

Since Xerox couldn't work smoothly, he assumed that som...

单项选择题Since Xerox couldn't work smoothly, he assumed that someone had ______ with it.

The two countries are obliged to abide by the internati...

单项选择题The two countries are obliged to abide by the international conventions and ______ of these chemical weapons under the convention.