气焊紫铜时,应使焰心至溶池表面保持的距离是()。
A、1-4mm
B、2-5mm
C、3-6mm
D、4-7mm
参考答案:A
选词填空。
(1)大家也都渴望借这个机会____一下:他们的邻人究竟有多么笨。(检查 检验 测验)
(2)这些衣服____得像蜘蛛网一样。(轻巧 轻柔 轻便)
(3)是的,我将要____皇上,我对这布料非常满意。(呈上 呈报 报告)
(4)于是他又在镜子前面把身子____了一下。(转动 摆动 摇动)
The head teacher with his students ______ Qinglongshan Park if it ______ tomorrow. [ ]
A. is going to; isn't rainy
B. are going to; isn't rainy
C. is going to; won't rain
D. are going to; doesn't rain