在北半球当船舶逐渐接近台风时,气压和风力变化为()。
A.气压下降,风力减小
B.气压上升,风力减小
C.气压下降,风力增大
D.气压上升,风力增大
参考答案:C
I wonder how it ____ that Chinese climbers successfully finished the torch relay on the Mount Qomolangma, where the air is so thin.
A.came out
B.came about
C.came over
D.came across
碘钨灯内抽真空后再充入适量和()气体。
A、氩气
B、汞蒸汽
C、氢气
D、空气