《技术性贸易壁垒协议》的宗旨。
参考答案:
指导世界贸易组织成员制定,采用和实施正当的技术性措施,鼓励采用国际标准和合格评定程序,保证这些措施不构成不必要的国际贸易障碍。
阅读加油站!阅读短文,回答问题。
One day, a duck swims in the river. A chicken goes for a walk on the riverside. Suddenly (突然), they see
some delicious (美味的) foods. Then they run to them at the same time. The chicken says, " I am taller than
you. I am more beautiful than you. And I am older than you. So I should eat more." " Oh, no!" says the duck.
" It's unfair (不公平) I see them first. And I am younger than you. I should eat more." They quarrel (争吵)
and quarrel. At last they eat nothing. Why? When they are quarrelling, a bird eats them all.
1. Who goes for a walk by the river?
2. Is the chicken younger than the duck?
3. Why are they quarrelling?
4. Do the chicken and duck eat the foods at last?
5. Who eats the foods?
发生嵌顿最重要的原因是()。
A.疝内容物大,疝囊小
B.疝环小,腹压剧增
C.疝内容物与疝囊粘连
D.疝囊颈部水肿
E.疝内容物弹性差