下列哪条不是疟疾暴发的常见原因（）。 A.传染源的流行和扩散 B.人群免疫水平的自然

—What did Maria say

— ().

A. Maria said that she likes their uniforms.

B. Maria said that she doesn't like their uniforms.

C. Maria said that she didn't like their uniforms.

D. Maria said that she was like their uniforms.

具有补气固本，滋补肝肾功能（）

A．栓剂 

B．合剂 

C．糖浆剂 

D．胶囊剂 

E．露剂

伽马射线源屏蔽容器体上应有下面哪种标志？（）

A、“严禁烟火”字样

B、危险性标志

C、放射性标志

D、“请勿靠近”字样

12岁儿童，下蹲动作时必须踮起脚跟并双膝分开外展，呈蛙式样，体检可发现臀部外上部有皮肤凹陷，髋内收时凹陷更明显，臀部可及紧缩感，下肢呈外展外旋位，髋内收、内旋受限，主要诊断为（）。

A.髋关节发育不良

B.臀肌挛缩

C.佝偻病

D.髋关节结核

E.强直性脊柱炎

PB1302配方选择加回收VCM时，至少加（）t。

A.2

B.3

C.1D510重量的20%