搜题请搜索小程序“爱下问搜题”
问题 单项选择题

输尿管结核患者，静脉肾盂造影的典型表现为（）

A.输尿管不规则狭窄和扩大，呈串珠状，边缘呈虫蚀状

B.输尿管囊样扩张

C.输尿管内见圆形致密影

D.输尿管扭曲

E.输尿管内见不规则透光影

答案

参考答案：A

单项选择题

Air pollution is caused by many things. Great clouds of smoke come from factories. Cars send smoke and fumes into the air. Burning waste fills the air with bits of dirt. Even burning leaves add smoke to the air. Sometimes, planes cannot find their landing spots through smoke. Smoke of all kinds is bad to breathe and can do great harm to the body.

Still, we cannot live without air. We must find a way to clean the air we have.

In time, we may have factories that are run by atomic energy. Our cars may run on smoke-free electric power. Scientists are also working on new ways to help the oil burned by cars from making fumes. Waste may be burned in the sand on ocean floors.

These changes might keep our air clean in the years to come. But until then, many scientists are looking for ways to make air cleaner now.

Why would electric cars cut down on air pollution().

A. They go only a short way.

B. They are easier to keep clean.

C. Electric power has no smoke.

D. Electric cars need no energy.
查看答案
单项选择题 A2型题

女性患者，34岁，平素体健。2年前剖宫产分娩史，月经量多，有痛经。现要求避孕指导，该妇女可以选择的避孕方法是（）

A.左炔诺孕酮IUD

B.TCu380AIUD

C.TCu220CIUD

D.吉妮IUD

E.左炔诺孕酮片（毓婷）
查看答案