患者男性,44岁,手术过程中突然出现皮肤、黏膜苍白,手术区血色变暗发紫,应考虑( )
A.心脏停搏B.DICC.凝血功能障碍D.心房纤颤E.术中血管损伤
参考答案:A
阅读理解。
A: Who’s that boy?
B: That is my brother. He is Sam. Hello! Sam. This is Sue. She is my good friend. We’re in the same class. This is Sam. He is my brother.
A: Good morning,Sam.
B: Good morning,Sue. Nice to meet you. How do you do?
A: How do you do? Oh,you look the same (看起来一模一样). Are you twins?
B: Yes,you’re right. This way,please.
A: OK.
B: Let’s go.
1. Who’s that boy?
A. Sam.
B. Sue.
C. "I".
2. Who are good friends?
A. Sue and I.
B. Sam and I.
C. Sam and Sue.
3. Who are twins?
A. Sue and Sam.
C. Sue and I.
4. _____ are in the same class.
A. Sue and I
B. Sue and Sam
C. Sam and I
小明家住一座七层宿舍楼的五楼,每层楼高为3 m,他家在楼顶上安装了太阳能热水器,接收太阳能总有效面积1.2 m2,能把接收的太阳能的50%转变化为水的内能,g=10 N/kg。求:
(1)假设小明家水管口距离五楼地面上的高度为1m,热水器水箱离七楼顶面的高度也为1 m,将100 kg的水从小明家压到楼顶的水箱,应至少做功多少?
(2)天气晴朗时,若每平方米的面积上在1 h内得到太阳辐射能平均为2.8×106 J,这台热水器每天能将初温为20 ℃,质量为100 kg的水加热到多少度?[每天接收太阳能的时间以10 h计算,水的比热容4.2×103 J/(kg·℃)]