锯有机玻璃前,要先在轮廓线的转折处()。
A、打孔
B、画圆
C、锯断
D、加厚
参考答案:A
根据汉语提示拼写单词,并注意使用其正确的形式。
小题1:The meeting will be (举办) in the community center.
小题2: (旅游业) is a big industry in Spain.
小题3:Webber had three (音乐剧) playing in London at one time.
小题4: The little boy can (背诵) more than one hundred Tang Poems.
小题5:He always has (聪明的) ideas for making money.
采用多级压缩和中间冷却的压缩机,可以()
A.提高压缩机排出压力
B.降低容积效率
C.提高排出温度
D.降低成本