数控机床对刀具的要求是高的耐用度、高的交换精度和快的交换速度。
参考答案:对
. As a result of the snowstorm, the village was ____ from the outside world for more than a week.
A.cut down
B.cut off
C.cut out
D.cut up
胃阴虚证的特点是()
A.胃脘绵绵冷痛,时发时止,喜温喜按,食后痛减
B.胃脘隐隐灼痛,饥不欲食,或胃脘嘈杂
C.脘腹冷痛,痛势暴急,遇寒加剧.得温痛减
D.胃脘灼痛,拒按,渴喜冷饮
E.脘腹胀满疼痛、拒按,嗳腐吞酸,厌食