关于妊娠期高血压疾病下列不正确的是()。 A.有慢性高血压者不易发生 B.初产妇多于

题型:单项选择题

问题:

关于妊娠期高血压疾病下列不正确的是()。

A.有慢性高血压者不易发生

B.初产妇多于经产妇

C.妊娠20周前一般不发生

D.多胎易并发妊娠期高血压疾病

E.眼底变化可以反映妊娠期高血压疾病的进展和严重程度

考点:护理学(医学高级)九、妊娠期并发症妇女护理九、妊娠期并发症妇女护理题库
题型:单项选择题

室温下取0.2 mol·L-1 HA溶液与0.2 mol·L-1 NaOH溶液等体积混合(忽略混合后溶液体积的变化),测得混合溶液的pH=8,试回答以下问题:      

(1)①混合溶液中水电离出的c(OH) _____0.1mol·L-1NaOH溶液中水电离出的c(OH);(填“>”、“<”、或“=”)

        ②求出混合溶液中下列算式的精确计算结果(填具体数字):

             c(Na+) - c(A)=_____mol·L-1

             c(OH)-c(HA) =_____mol·L-1

(2)室温下如果取0.2 mol·L-1 HA溶液与0.1 mol·L-1 NaOH溶液等体积混合,测得混合溶液的pH>7,则说明HA的电离程度 ______NaA的水解程度。(填“>”、“<”、或“=”),溶液中各离子浓度由大到小的顺序为 _______

题型:单项选择题

隧道施工监控测点一般设置在距开挖工作面2m范围内,开挖后12h内,下次爆破前测取出读数。( )

题型:单项选择题

公安机关的职责,是指公安机关在国家法律所确定的管辖范围内,为实现一定的目标所进行的工作内容。( )

题型:单项选择题

It may look like just another playgroup,but a unique educational center in Manhattan is really giving babies something to talk about. "It’s a school to teach languages to babies and young children with games, songs—some of the classes also have arts and crafts," said Francois Thibaut, the founder of the Langrage Workshop for Children, a place where babies become bilingual.

Children as young as few months are exposed to French and Spanish before many of them can even speak English. Educators use special songs and visual (视觉) aids to ensure that when a child is ready to talk, the languages will not be so foreign. "Children have a unique capacity to learn many languages at the same time," said Thibaut. "Already at nine months, a child can tell the differences between the sounds he or she has heard since birth and the sounds he or she has never heard yet." Thibaut says the best time to expose children to language is from birth to 3 years old. For the last 30 years, the school has been using what it calls the Thibarut Technique, a system that combines language lessons with child’s play.

"I always wanted to learn Spanish, but by the time I got to high school it was too late to pick it up and speak fluently," said Marc Lazare, who enrolled his son at the school. "I figured at this age, two, it’s a perfect time for him to learn."

Aside from learning a language, the kids also gain a tremendous sense of confidence. One young student boasted that aside from French, she can speak five languages (though that included "monkey" and "lion"). The school gives children the tools to communicate, and sometimes that gives them an advantage over their parents. "I think they sometimes speak French when they think I won’t understand them," said parent Foster Gibbons.Depending on the age group, classes run from 45 minutes up to 2 hours. Even when students are not in class, the program is designed to make sure the learning continues at home. Tapes and books are included, so kids can practice on their own.

The passage tells us that the best time for a child to learn languages is ().

A. before seven years old

B. from birth to three years old

C. in his childhood

D. in his teens

题型:单项选择题

反馈系统的作用是使油动机的动作过程稳定,它通过()构成反馈环节。

A、弯角杠杆

B、杠杆

C、活塞杆

D、错油门滑阀

更多题库