喷丸机的螺旋输送器有何作用?
参考答案:它能把钢砂从斜槽中输送至溜管处,通过溜管滑至喷丸机底部,便于提升料斗工作。
I bought some CDs for my friend and they ______me 30 yuan. [ ]
A. spend
B. cost
C. paid
D. used
根据情景,选择最佳答案。
1.当你的朋友告诉你星期六去野餐的时候,他会说:[ ]
A. Can you have a picnic on Saturday?
B. We're going to have a picnic on Saturday.
2.当你想知道大明下午会不会踢足球时,你可以这样问:[ ]
A. Will you play football this afternoon?
B. I'll play football this afternoon.
3.你想告诉别人明天是你的生日时,你可以这样说:[ ]
A. Tomorrow is Sunday.
B. Tomorrow is my birthday.