搜题请搜索小程序“爱下问搜题”
问题 单项选择题

施工中的“三大措施”计划中的（）措施计划，要以QJ/CDY·001—1991和DL5009·2—1994为依据来编制。

A.施工组织

B.施工技术

C.施工安全

D.质量验收

答案

参考答案：C

单项选择题

男性，46岁。面色苍白、鼻出血、皮肤瘀点2个月就诊。体检：中度贫血貌，皮肤散在出血点，脾肋下2cm。化验：Hb70g／L，WBC2．5×109／L，血小板32×109／L，周围血涂片有核红细胞2／100WBC。哪种疾病诊断最不可能（）

A.骨髓纤维化

B.骨髓增生异常综合征（MDS）

C.急性非白血性白血病（隐匿型）

D.再生障碍性贫血

E.阵发性睡眠性血红蛋白尿
查看答案
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.

Scientists are now working on ways to ______.

A. keep planes from :flying
B. bury sand on ocean floors
C. stop air pollution
D. burn leaves without smoke
查看答案