视觉记忆和听觉记忆在14岁前发展非常迅速，到15岁以后发展出现了_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

视觉记忆和听觉记忆在14岁前发展非常迅速，到15岁以后发展出现了停滞；在（）岁时，视觉记忆超过听觉记忆，二者的差异随年龄增加而扩大。

答案

参考答案：9

单项选择题 A3/A4型题

患者，男，30岁。阵发性高血压，发作时血压高达200/120mmHg，伴头痛、面色苍白、心慌、出汗，持续半小时，发作间歇血压正常。

初步考虑诊断为（）

A.嗜铬细胞瘤

B.肾性高血压

C.高血压危象

D.原发性醛固酮增多症

E.皮质醇增多症

单项选择题

(五)

Space travel is definitely bad for astronauts’ bones, reducing their bone density after only a month of weightlessness, according to French research published on Friday.
Laurence Vico and his fellow workers at St Etienne University called for more research into the effects of microgravity, after their study of 15 astronauts from the Russian MIR station showed bone loss continued throughout space flights.
"Bone loss was especially striking in four astronauts, " the scientists reported in the Lancet Medical Journal.
They measured the Bone Mineral Density(BMD) of bones in the forearm and lower leg of the astronauts who had spent one to six months in space.
The BMD loss was significant in the tibia of the lower leg, a weight-bearing bone, but barely changed in the radius of the forearm. "Our results indicate the need to investigate not only different bones, but also different areas of the same bone since not all sites of the skeleton are similarly affected by space conditions, " they added.
Without gravity the body isn’t bearing any weight so there is no need for calcium which makes bones p, and it becomes empty into the bloodstream.
The research team suggested in future scientists should try to determine if the loss of bone density was only on weight-bearing bones on longer flights, also the possible recovery after returning to Earth.

In the third paragraph, the word "striking" means ______.

A．unusual

B．simple

C．weak

D．slow