患者，男性，25岁，以饮酒后左上腹疼痛伴恶心、呕吐8小时就诊。该患者腹痛呈持续性刀割样疼痛，并向左腰背部放射，呕吐后疼痛不缓解。查体：急性痛苦面容，大汗淋漓，左上腹压痛明显。化验血淀粉酶明显高于正常。
提问：急性胰腺炎患者淀粉酶测定下列各项中正确的是（）
A.血淀粉酶在起病后6～12小时开始升高
B.尿淀粉酶升高比血淀粉酶晚
C.血淀粉酶持续3～5天
D.尿淀粉酶持续7～14天
E.淀粉酶的高低一定能反映病情的轻重
F.尿淀粉酶升高比血淀粉酶早
参考答案：A, B, C, D
| 阅读理解。 |
| Do you know why different animals or pests (昆虫) have their special colors? Colors in them seem to be used mainly to protect themselves. Some birds like eating locusts (蝗虫), but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of the colors of crops (庄稼). When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night. If you study the animal life, you'll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters (猎人). This is because they have the colors much like the trees. Have you ever noticed an even stranger act? A kind of fish in the sea can send out a kind of very black liquid (液体) when it faces danger. While the liquid spreads over (散开), its enemies (敌人) cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all. |
| 1. From the passage we learn that locusts________. |
[ ] |
| A. are small animals B. are easily found by birds C. are dangerous to their enemies D. change their colors to protect themselves |
| 2. How can pests with different colors from plants keep out of danger? |
[ ] |
| A. They run away quickly B. They have the colors much like their enemies C. They hide themselves by day and appear at night D. They have to move quietly |
| 3. Bears and lions can keep safe because _________. |
[ ] |
| A. they have the colors much like the trees B. they move quietly C. they like brown and gray colors D. they live in forests |
| 4. Why can the kind of fish live up to now? |
[ ] |
| A. Because it is very and strong. B. Because the liquid it sends out can help it escape from its enemies. C. Because the liquid it sends out can kill its enemies. D. Because it swims faster than any other fish. |
| 5. Which is the best title for this passage? |
[ ] |
| A. The Change of Colors for Animals and Pests B. Colors of Different Animals and Pests C. The Main Use of Colors for Animals and Pests D. Some Animals and Pests |