画刀
参考答案：
学过油画的人都知道油画不仅能用笔画而且还可以使用特制的油画刀进行绘制。
．—I did not know you were good friends．
—You___．I have known her since she moved here．You were abroad then．
A．may have
B．needn’t have
C．couldn’t have
D．must have
提示胎儿窘迫的重要指标是
A.胎动减少
B.羊水有胎粪污染
C.新生儿误吸
D.胎儿心率变化
E.胎儿头皮血pH降低
