拖拉机每分钟行300米,卡车每分钟比拖拉机多行300米,卡车6分钟多少米?
(300+300)×6,
=600×6,
=3600(米);
答:卡车6分钟行驶3600米.
---Can you tell me something about metal ?
---Metal making machines and many other things .
A.used to
B.is used for
C.is used as
D.is used to
男性,68岁,阵发性腹痛1周伴呕吐入院。体格检查:腹胀,见肠型,肠鸣音亢进,有气过水声。X线见腹中部扩张小肠呈阶梯状排列,有液平,结肠内无积气
为了明确诊断,下列哪项检查不宜选择
A.CT或MRI
B.B超检查
C.胃肠钡餐检查
D.肠系膜上动脉造影
E.放射性核素扫描