题目详情:
Many people have difficulty in studying mathematics. Sometimes their difficulty (61) from the psychological idea that they are "no good (62) math". It has been demonstrated many times that it is often this idea (63) is causing their problems (64) than any lack of skill in mathematics. The (65) way to deal with this problem is to (66) yourself that math "involves using the same numbers you have been using (67) your life and that you know them as well as (68) else". Then set your mind to learning how they are used in the (69) part of mathematics you are studying.
Another problem many people (70) is that in mathematics, unlike some other (71) you may have studied, the material has a very important (72) or order. If you don’t understand a (73) of a mathematics text, it is no (74) going on to the next section. Many sections of math books are (75) o
A. series
B. lot
C. fraction
D. section
二八岁初孕妇,14周妊娠,门诊查体时发现宫高平脐,多普勒胎心仪听到两个频率不同的胎心音。怀疑为双胎妊娠。
(假设信息)第一胎儿娩出后,下一步处理错误的是( )