患儿,男,9个月。左眼视力差。CT图像示左眼球内不规则软组织肿块,内有钙化,肿块呈轻

题型:单项选择题

问题:

患儿,男,9个月。左眼视力差。CT图像示左眼球内不规则软组织肿块,内有钙化,肿块呈轻度强化,应诊断为()

A.脉络膜血管瘤

B.视网膜炎

C.视网膜母细胞瘤

D.黑色素瘤

E.视网膜剥离

考点:专业理论专业知识综合习题专业知识综合习题题库
题型:单项选择题

The six-year-old Billy was seriously ill.

“Billy, what do you wish to do in the future?”

“Mom, I always want to be a fireman.”

His mom went to a fire station. She told a fireman about her son. She asked if it might be possible to give him a ride in a fire engine(消防车). The fireman said, “We can do better. We’ll  make him an honorary(名誉的)fireman for the whole day. He can come to the fire station, eat with us and go out on all the fire calls. If you give us his sizes, we’ll get a real fire uniform for him.”

Three days later, that fireman dressed Billy in his fire uniform and drove him to the fire station. Billy was so excited. There were three fire calls that day. Billy rode in different fire engines and went out all the three calls.

Billy’s dream came true. He lived three months longer.

小题1: Did Billy want to be a policeman?

小题2: Who dressed Billy in his fire uniform?

小题3:. How many fire calls were there that day?

题型:单项选择题

如图为两个物体A和B在同一直线上从不同位置出发,沿同一方向同时开始做匀加速运动的速度时间图象.已知在第3s末两个物体相遇,则这两个物体的出发点的位置关系为(  )

A.B在A前6m处

B.A在B前6m处

C.B在A前3m处

D.A在B前3m处

题型:单项选择题

为保证普通快滤池反冲过程中配水均匀,设计正确的措施是()。

A.采用高位水箱反冲洗,应尽量减少水箱的设计高度

B.采用高位水箱反冲洗,应尽量减少水箱的设计水深

C.采用大流量水泵反冲洗,应尽量减小吸水池水位变化

D.采用水泵直接反冲洗时,应尽量降低冲洗水泵的安装高度

题型:单项选择题

----Which of the story books do like best?

-----_____. They both are expensive and of little intrest.

A.None

B.Nothing

C.Neither

D.Either

题型:单项选择题

如图所示,一木块在垂直于倾斜天花板平面方向的推力F作用下处于静止状态,则下列判断正确的是(  )

A.天花板与木块间的弹力可能为零

B.天花板对木块的摩擦力可能为零

C.推力F逐渐增大的过程中,木块将始终保持静止

D.木块受天花板的摩擦力随推力F的增大而变化

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