As he was too young, he was not ___ the concert hall.

A  admitted into  B asked for   C taken along    D brought with

切变线是一种特殊的槽线，它一般近于东西走向（）

A.其两侧有明显的气旋式风切变

B.其两侧的温度梯度不甚明显

C.一般只出现于低空850百帕或700百帕图上

D.A.B.C都对