左右输尿管芽的内侧互相愈合，使所诱导的左右肾下端互相融合成马蹄形（）
A.脑积水
B.神经管缺陷
C.双输尿管
D.马蹄肾
E.膀胱外翻
参考答案：D
阅读短文，用方框内所给单词的正确形式填空，使短文意思通顺、完整。请将答案写在短文后相应题号的横线上。注意：①每个单词只能用一次。②每空限填一词，有些词需要做相应的变化。③其中有两个多余选项。
A car needs gas to run and your body also needs food to work. 小题1:_____ the right kind of food is very important. It can help your body grow strong, so take care of _小题2:____ you eat.
There are four main food groups together. The dairy group has food like mild, cheese, and yogurt. The other three __小题3:____ are the meat and fish group, the fruit and vegetable group, and the bread and rice group. Each meal should have at ___小题4:___ one food from all the four main groups. With all these food together, you will be __小题5:____ enough energy during the day.
It’s easy to get into bad eating __小题6:___. You may eat your breakfast in a hurry to get to school on time. Or you may not have time for a good lunch. It may seem easy to _小题7: your supper with fish and chips all the time. But you will find ___小题8:__tired during these days and you can’t think quickly.
Watching what you eat will help keep your body __小题9:_ and strong. It’s also good to take some exercise. It will __小题10:_ you eat more if you take a walk or play games in the open air. Having a good eating habit with some exercise is the key to your health.
车辆的日常维防止四漏，指的是防止（）。
A、漏水
B、漏油
C、漏气
D、漏电
l these food together, you will be __小题5:____ enough energy during the day.
th.