如果ag某气体中含有的分子数为b,则cg该气体在标准状况下的体积是(NA为阿伏加德罗常数)[ ]
A.
B.
C.
D.
答案:A
甲为一乘客(老烟民,熟知烟的价格),乙为一小贩。乙在火车车厢叫卖:“红塔山香烟,10元钱一条。”甲欣然买之。经查,该烟为假烟,甲与乙之间的行为性质应如何认定( )
A.无效民事行为,理由为欺诈
B.可撤销民事行为,理由为欺诈
C.无效民事行为,理由是违反法律规定
D.有效民事行为,理由是双方达成合意
At what gestational age would a primigravida expect to feel "quickening"
A.12 weeks.
B.16 to 18 weeks.
C.20 to 22 weeks.
D.By the end of the 26th week.