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问题 单项选择题 A3型题

男孩，1个月，反复呕吐1周，呕吐发生于进食后10～30分钟，呈喷射性，不含胆汁；查体：一般情况好，无脱水征，上腹可见胃蠕动波，右上腹可触及包块。

为明确诊断，首选的辅助检查是（）

A.腹部B超

B.钡餐

C.胃镜

D.腹部CT

E.腹部平片

答案

参考答案：A

阅读理解
阅读下面的短文，根据短文内容完成表格中所缺信息，每空一词。
Halloween falls on October 31st. It is one of the favourite festivals for children in the West. People dress up in different costumes like a witch, a ghost(鬼) or a skeleton (骷髅). The children go to houses to say “Trick or treat!” The game is so fun. Before, if a child is bad, he or she will get a trick like having a stone in his or her bag instead of (代替) some candy. Nowadays (如今), no one gets tricks. Every child can receive lots of candy. Parties are also popular in the evening. People get to parties in different costumes and play different games. People also listen to ghost stories and watch scary movies.
A FUN FESTIVAL
____1_____is on October 31st. This is one of the_____2_____ festivals in the West.
What people can do
Wear ______3________costumes.
Play an interesting game ______4_______‘trick or treat’.
Have______5_________in the evening. 
_______6________to ghost stories and watch scary movies.
Changes
Before, if a child is ______7_____, he or she will get a _____8_____instead of some ______9________.
Now, nobody will get tricks. ____10____child will get candy as a treat.
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单项选择题

经营预测的种类按预测的方法，可分为（）。

A.定性预测、定量预测和综合预测。

B.定性预测和定量预测

C.定量预测和综合预测。

D.定性预测和综合预测
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