Question 3
A. Because the business began legal action.
Because the business charged them $7,000.
C. Because the couple said the review was true.
D. Because the couple was too sad and unhappy.
Question 4
A. Free speech is protected in the US.
B. The news media can be very helpful.
C. Online reviews can be very powerful.
D. Online reviews can lead to legal action.
以下哪个不属于DNA是遗传物质的经典探究实验
A. 格里菲斯肺炎双球菌体内转化实验
B. 艾弗里转化因子实验
C. T2噬菌体侵染实验
DNA的X射线衍射图谱实验
关于DNA的说法中,哪项是错误的
A. 其基本组成单位是脱氧核糖核苷酸
B. 四种碱基分别为A T C G
C. 空间结构为双螺旋
D. 碱基对排列在内侧构成其基本骨架