A:get; pack
B:got; packing
C:got; pack
D:get; packing
My friends thought they had made things very smooth for me, but I felt there was still much to ________ with.
2016年8月16日,全球首颗____“实验卫星”在酒泉卫星发射中心发射,这在世界上首次实现了卫星和地面之间的量子通信,构建了一个天地一体化的量子保密通信与科学实验体系。( )
如图,一圆柱高为8cm,底面周长为30cm,蚂蚁在圆柱表面爬行,从点A爬到点B的最短路程是( )