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问题 单项选择题 A3/A4型题

王女士，25岁，孕39+2周，G1P0，腹部阵痛6小时入院。产科检查：骨盆外测量正常范围，宫高32cm，腹围96cm，胎方位LOA，宫缩30～40秒/3～4分钟，胎心率142次/分，肛查宫口开大4cm，前羊膜囊膨隆。B超检查BPD9.1cm，羊水指数12.5cm，胎盘成熟度Ⅲ级。

孕妇宫口开全后，在接产过程中，下列措施哪项是错误的（）。

A.宫缩时，接产者以手掌向上向内托压会阴体保护会阴

B.宫缩时，协助胎头俯屈

C.待胎儿枕骨下部显露于母体耻骨弓下时，协助胎头仰伸

D.协助其在宫缩期不屏气情况下娩出胎头

E.胎肩娩出后应注意保护会阴

答案

参考答案：D

单项选择题

下列不是产生系统误差的条件是（）

A、仪表自身缺陷

B、仪表使用方法不当

C、观测人员习惯或偏向

D、使用者精神不集中
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单项选择题

Artificial flowers are used for scientific as well as for decorative purposes. They are made from a variety of materials, such as wax and glass, so skillfully that they can scarcely be distinguished from natural flowers. In making such models, painstaking and artistry are called for, as well as thorough knowledge of plant structure. The collection of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known throughout the scientific world. In all, there are several thousand models in colored glass, the work of two artist-naturalists, Leopold Blaschka and his son Rudolph.

The intention was to have the collection represent at least one member of each flower family native to the United States. Although it was never completed. It contains more than seven hundred species representing 164 families of flowering plants, a group of fruits showing the effect of fungus diseases, and thousands of flower parts and magnified details. Every detail of these is accurately reproduced in color and structure. The models are kept in locked cases as they are too valuable and fragile for classroom use.

Which of the following statements is true of the flowers at Harvard University（）

A. They form a completed collection.

B. They have a marvelous fragrance.

C. They are loaned to schools for classroom use.

D. They use authentic representations.
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