低温麻醉时体温降到30℃氧耗量可减少：（）。

A.10%～20%

B.21%～30%

C.31%～40%

D.41%～50%

E.51%～60%

95. The scooter(滑板车) has been popular _______ a lot of children since the year before last.

A．by

B．for

C．in

D．With