下列物质跟氢氧化钠溶液不能发生反应的是[ ]
A、MgCl2
B、Al(OH)3
C、CO
D、SO2
答案：C
—Do you like this shirt?
—Yes. It ______ very soft. [ ]
A. is feeling
B. feels
C. is felt
试述电子合同的履行、特点、附随义务及验收。
