C1318型单轴转塔自动车床钻深孔时,可以分几次钻,第一次钻孔深度通常取孔径的()。
A、1倍
B、2倍
C、3倍
D、4倍
参考答案:B
根据句意及汉语提示,写出各单词的正确形式,每空填一词。
小题1:The camera was one of the great ________ in the second half of the 19th century. (发明)
小题2:Some people are good at ________, but they never give back. (借)
小题3:With the _______ of modern medicine, many difficult illness can be cured and prevented.(发展)
小题4:Everyone was very generous and they had lots of support from local b________. (企业)
小题5:They are so weak that they can’t walk any ________. (远)
清蒸滑鸡应该使用()火蒸
A.猛
B.中
C.慢
D.先猛后中