某男,78岁,拟行胆囊切除术。有活动后胸前不适感,术前检查哪一项最必要()。
A.胃镜
B.胃肠造影
C.肝功能
D.心电图
E.血气分析
参考答案:D
解析:观察是否心肌缺血改变。
We'll go to Guangzhou ________ train. [ ]
A. on
B. by
C. in
D. take
完成句子 根据所给的汉语,完成下列句子。
小题1:阅览室的书不允许被带出去。
The books in the reading room ____________________________________.
小题2:我有很多作业要做,我经常熬夜来完成这些练习。
I have so much homework to do that I often _________________________.
小题3:你确定他们经常在实验室里做实验吗?
Are you sure they _____________________________________?
小题4:因为大雨,我们别无选择,只能放弃旅行。
We ______________________________________because it rained heavily.
小题5:彼得在学习上取得了很大进步,他的父母都很开心。
Peter _____________________________________that his parents are very happy.
小题6:他很有想象力,能很快想出各种办法。
He is imaginative enough ______________________________________.