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211.A new satellite sweeping over the poles at altitudes of up to 32,000 miles is called POLAR, giving scientists their best look yet at the magnetosphere, the region of space under the invisible influence of Earth’s magnetic field.
A. A new satellite sweeping over the poles at altitudes of up to 32,000 miles is called POLAR, giving scientists their best look yet at the magnetosphere, the region of space under the invisible influence of Earth’s magnetic field.
B. A new satellite called POLAR that is giving scientists their best look yet at the magnetosphere, the region of space under the invisible influence of Earth’s magnetic field, sweeping over the poles at altitudes of up to 32,000 miles.
C. Scientists are getting their best look yet at the magnetosphere, the region of space under the invisible influence of Earth’s magnetic field, from a new satellite sweeping over the poles at altitudes of up to 32,000 miles called POLAR.
D. Sweeping over the poles at altitudes of up to 32,000 miles, a new satellite called POLAR is giving scientists their best look yet at the magnetosphere, the region of space under the invisible influence of Earth’s magnetic field.
E. Sweeping over the poles at altitudes of up to 32,000 miles, scientists’ best look yet at the magnetosphere, the region of space under the invisible influence of Earth’s magnetic field, is coming from a new satellite called POLAR.
正确答案是D
请问里面their指代什么啊?句意是satellite但是应该是单数啊。我哪里理解错了?
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