What’s the relationship between the two persons?
A:They didn't know each other.
B: They were good friends.
C: They were husband and wife.
D: They were mother and son.
用显微镜的镜头观察物体时,所用的目镜上标有10×,物镜上标有15×,那么所观察的物体被放大了( )
豆腐起源于我国,食用豆腐能获得人体所需要的多种氨基酸,其中含量最多的是亮氨酸(化学式:C6H13NO2)。下列下有关亮氨酸的说法错误的是( )
(2015·海南)2014年10月23日,***第十八届中央委员会第四次全体会议审议通过了《中共中央关于全面推进____若干重大问题的决定》 。( )