问题 单项选择题

用热性药治疗具有假热症状的病证,属于

A.热因热用
B.寒因寒用
C.塞因塞用
D.通因通用
E.热者寒之

答案

参考答案:A

解析: “塞因塞用”指用补益药物来治疗具有闭塞不通症状的虚证,适用于真虚假实证;“热因热用”指用热性药物来治疗具有假热征象的病证,适用于真寒假热证。

单项选择题
单项选择题

Some spiders hunt on the ground, others build webs to trap their food, but the grass water spider catches its prey by running along the surface of the water.
This special water spider lives on the grassy banks of streams where mosquitoes, damsel flies and other insects come to feed and breed.
Although it is one of the largest spiders in New Zealand, it has an unusual ability. It doesn’t disturb the water as it waits for its meal, and there is barely a ripple when it skims across the surface at lightning speed to catch its prey.
Grass water spiders deal swiftly with larger insects like damsel flies by pulling their heads under the water and holding them there until they drown.
After a meal, the grass water spider spends up to half an hour grooming itself. It wipes its eight eyes, brushes its antennae, and takes special care to clean the hairs on its body.
It is the hairs that trap tiny bubbles of air so that the spider can run down a blade of grass and stay underwater for up to an hour when it is frightened. The hairs also keep the spider dry, even underwater.
It is only when the female spider is caring for the young that she does not hunt on the water. After mating, she produces a large egg sac, which she carries around for five weeks. Once the eggs start to hatch, she attaches the sac to some blades of grass or a thistle. She then tears the sac open and releases the tiny spiders into the nursery web.

The writer describes the special spider as "special" because ______.

A. it walks on water

B. it has eight eyes
C. of its hairy appearance

D. of the way it produces its young