Sentence Correction
试题详情
题目：
The most vexing problem faced by researchers exploring wind-powered
generation of electricity is achieving a constant flow of power
from an unpredictable natural source that meets demand,
but so the flow does not overload electrical grids with sudden
voltage increases选项:
A、achieving a constant flow of power from an unpred-ictable natural source that meets demand, but so the flow does not overload
B、achieving a constant flow of power from an unpredictable natural source, which meets demand but without overloading.
C、how to achieve a constant flow of power from an unpredictable natural source, a flow that meets demand but does not overload.
D、how to achieve a constant flow of power from an unpredictable natural source, but a flow that meets demand without overloading
E、how a constant flow of power from an unp-redictable natural source can be achieved, which meets demand but does not overload.
答案:
C
