圆作木工常用刨的种类,有外方刨、斜曲刨、斜边刨、座刨、滚刨、落底刨、抄刨等,种类繁多,使用灵巧方便。
参考答案:错
When_________why he was late, he made no answer.
A.questioned
B.questioning
C.asking questions
D.question
对于稳定热传导,在热流方向上传热速率保持不变。