车削多线螺纹时,采用交换齿轮分线法加以控制,其优点是分线精确度()。
A.高
B.低
C.没有误差
D.较低
参考答案:A
----Do you know the girl in the white dress?
----Yes, she’s ____ university student. She always takes _____ umbrella with her.
A.a ,an
B.an ,a
C.the ,a
D.an ,the
患者双足有踩棉花感,睁眼时站立稍不稳,闭目时加重,其病变部位在()
A.小脑
B.丘脑
C.后索
D.额叶
E.侧索