通过下列哪些检查可帮助判断高危孕妇孕晚期胎儿宫内情况()
A.L/S比值
B.NST
C.羊水穿刺
D.胎儿生物物理评分
E.OCT
参考答案:B, D, E
Daniel scored _____ points in the exam in his class. [ ]
A. less
B. the least
C. the fewest
D. fewer
简述性格差异的教学含义。