上消化道出血呕出的血常呈咖啡样，这是因为（） A.血液与胃内食物混合所致 B.血液与

My watch is not here. Maybe ______ took it. [ ]

A. somebody

B. anybody

C. everybody

D. nobody

Education cuts(削减) have become routine (惯常的) over the past few years, which has made it difficult for students to learn. The results of a survey of 1,850 Los Angeles County high school students show just how much the cuts are affecting students.

Because of teacher layoffs (解雇), class sizes at some high schools have risen to 50 students — even in math and English classes. Some 37 percent of students report that they sometimes don’t have a desk to sit at. Sixty-seven percent say crowded classrooms make them feel the teachers don’t have enough time to teach, and 30 percent say they’ve not been able to join in a program because it’s no longer offered at their school.

At a time when technology is an important skill, 52 percent of students say there aren’t enough computers. Or they’re often broken, and there’s no one to fix them. Fifty-one percent say they’ve had to share textbooks with a classmate because there aren’t enough copies to go around. Fifty-seven percent say they’ve had to copy information because their school doesn’t have enough paper to make copies.

“We have only one science teacher for the entire(整个的) high school,” writes Felix Ruano, a 16-year-old student. He goes on to describe how that teacher, who is only qualified to teach chemistry, is teaching physics — or, at least, is trying to do so. “He shows physics videos and we teach ourselves from our textbook,” says Ruano. And, as has been seen elsewhere, “all but one of the restrooms” at Ruano’s school “have been closed because we don’t have enough people to clean them.”

Ruano notes that though faced with the challenges, 97 percent of students say they plan to go to college. But without “properly trained teachers and the best resources,” says Ruano, it’s not likely that every student will achieve that goal. “Unless schools fix these problems,” he says, “students could lose hope.”

小题1:According to the text, education cuts have led to the following results EXCEPT that _____.

A．class sizes at some high schools have risen

B．some students don’t have a desk to sit at

C．some students have to share textbooks

D．some students have to leave school小题2:The underlined word “qualified” in the fourth paragraph can best be replaced by “_____”.

A．fit

B．willing

C．bored

D．worried小题3:According to Ruano, _____.

A．he is good at teaching himself

B．most students plan to go to college

C．his school is going to be closed

D．most students are hopeful about their school小题4:What would be the best title for the text?

A．What caused education cuts?

B．Education cuts, right or wrong?

C．Education cuts have hurt students

D．How to deal with education cuts

男性，31岁。发作性头痛、心悸伴大汗3次来诊。发病时体检：血压190／130mmHg，心率140次／分，面色苍白，数分钟可缓解，继而出现面色潮红。

患者入院后第19天时，于夜间突然发作剧烈头痛，胸闷，面色苍白，烦躁，血压180／130mmHg，2分钟后明显大汗，血压下降至40／20mmHg。以下均可能出现，除外（）

A.嗜铬细胞瘤瘤体内骤然出血

B.心衰

C.可能肿瘤分泌肾上腺素为主

D.严重心律失常

E.低血糖反应

低产水稻土中沤田的改良措施有哪些？

在超媒体系统的体系结构中，将超媒体系统划分为三层，它们是物理层，逻辑层和 【10】 层。