单项选择题
GM envisions a system（）the Mobility Internet.
A.calling
B.call
C.calls
D.called
点击查看答案&解析
相关考题
-
单项选择题
The car will be guided by a differential GPS system that corrects errors（）in global positioning satellite signals.
A.arising
B.rise
C.raise
D.arouse -
单项选择题
However, since methanol-fueled vehicles could be designed to be much more（）than gasoline clone vehicles fueled with methanol, they would need comparatively less fuel.
A.effective
B.efficient
C.sufficient
D.supplement -
单项选择题
Methanol’s most attractive feature is that it can reduce（）about 90 percent the vehicle emissions.
A.of
B.in
C.on
D.by
