液压管道应尽量短,横平竖直,转弯少,以减少压力损失。
参考答案:对
苯丙酮尿症的临床特点包括()
A.特殊面容,四肢粗短
B.可有抽搐发作或脑性瘫痪
C.皮肤白皙,易出现湿疹样皮疹
D.生后4个月左右发现智力低下
E.头发黄褐色,尿呈"霉臭"气味
We used to work in the same office and we ________ have coffee together.
A.should
B.would
C.could
D.might