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问题 选择题

下列杂交组合属于测交的是 [ ]

A．EeFfGg×EeFfGg

B．eeffgg×EeFfGg

C．eeffGg×EeFfGg

D．EeFfGg×eeFfGg

答案

答案：B

选择题

-Why didn't you arrive there until three days later?

-Because the heavy rain __________ the difficulties of the journey.[ ]

A. added

B. added to

C. was added

D. was added to
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单项选择题 共用题干题

1岁女孩，低热2天，伴厌食、尿频、尿急、排尿时哭闹。6个月前曾有尿路感染史，尿液分析：WBC（+++），脓细胞少许，红细胞（+），尿培养有大肠埃希菌生长，排尿性膀胱 * * 造影见 * * 、双输尿管、肾盂显影，但无明显扩张。

最可能的诊断是（）

A.原发性膀胱输尿管反流

B.输尿管下端梗阻

C.肾盂输尿管连接处梗阻

D.单纯尿路感染

E.肾输尿管重复畸形
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