利用等离子切割钢管时,将割炬滚轮接触钢管,喷嘴离钢管表面之间合适距离为()。
A、1~2mm
B、30~50mm
C、10~20mm
D、3~5mm
参考答案:D
句型转换
1. Your mother has never tried shopping on the Internet.(改为反意疑问句)
Your mother has never tried shopping on the Internet, _______ _______?
2. James spent ten years making this amazing film.(同义句转换)
_______ _______ James ten years to make this amazing film.
3. Chris had gone to South Africa to enjoy the 2010 World Cup. Karen had gone to South Africa to
enjoy the 2010 World Cup,too.(合并为一句)
_______ Chris____ Karen had gone to South Africa to enjoy the 2010 World Cup.
4. Visitors love this city because it has historical sights and delicious food.(改为简单句)
Visitors love this city_______ _______ its historical sights and delicious food.
在表单设计器环境中,为表单添加一选项按钮组:⊙男○女,默认情况下,第一个选项按钮“男”为选中状态,此时该选项按钮组的Value属性值为( )。
A.0
B.1
C."男"
D..T.