搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A3/A4型题

男，38岁，近半年来右上后牙牙龈反复肿痛。1年前该牙曾因自发痛。夜间痛于外院开髓。检查：右上第二前磨牙面开髓孔，根管内空虚，根尖部扪不适，叩痛（+）。电活力测无反应。颊侧中央有窄牙周袋，深达根尖，袋内溢脓。X线示根尖周膜影像模糊。

合理的治疗程序是（）

A.牙髓治疗

B.清除感染的残髓→清除牙周袋内的感染→完善的根管治疗

C.清除牙周袋内的感染→清除感染的残髓

D.完善的根管治疗→清除牙周袋内的感染

E.牙周治疗

答案

参考答案：D

单项选择题

Motherhood may make women smarter and may help prevent dementia in old age by bathing the brain in protective hormones, US reseachers reported on Thursday.
Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s. University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans.
"Our research shows that the hormones of pregnancy are protecting the brain, including estrogen, which we know has many neuroprotective effects, " Kinsley said.
"It’s rat data but humans are mammals just like these animals are mammals, " he added in a telephone interview. "They go through pregnancy and hormonal changes. "
Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline.
"When people think about pregnancy, they think about what happens to babies and the mother from the neck down, " said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida.
"They do not realize that hormones are washing on the brain. If you look at female animals who have never gone through pregnancy, they act differently toward young. But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations to the brain. \

"It’s rat data but humans are mammals just like these animals are mammals. "
What does the sentence suggest

A. The experiments on the rats have nothing to do with humans.
B. The experiments on the rats are very important for animals.
C. The experiments on the rats are much the same on humans.
D. The experiments on the rats are much the same on other animals.
查看答案
多项选择题

建立交通安全预警机制。按（）等情况及时启动预警机制。

A.气象

B.恶劣气候

C.地质灾害

D.人为因素
查看答案