钢结构工程施工中，不必按钢结构焊接规定进行焊接，还需进行焊接工艺试验和无损检验。( )
参考答案：错
eat the birthday cake.[ ]
A. Let is
B. Let
C. Let's
The Internet, as well as newspapers and magazines, ________a more and more important part in
our daily life.[ ]
A. have played
B. are playing
C. is playing
D. has been played
