号称“海藻之王”的是（）。A、红藻 B、绿藻 C、巨藻 D、大叶藻

简述收费统计台账每日核账的基本内容。

What is distance learning It means that you study on your own, at home or wherever suits you. Recently, the world famous Open University in the United Kingdom has designed a new style of distance learning, which is called (1) . The phrase "Open Learning" means you study (2) . You read course material, work on course activities, and write (3) . The word "Supported" means you have help (4) , the student services staff at regional centres, and centralized areas such as (5) . You can also contact other students through tutorials and (6) , the University’s online conferencing system, and events and clubs organized by (7) . Most distance learning courses use printed paper materials. They also include some (8) materials such as a CD, DVD or video. Many courses have a web site and an (9) . You’ll need access to a computer (10) to make use of these. The Open University can help its students buy a computer and (11) the cost of accessing the Internet.

With most distance learning courses, no (12) are required to study. of course, you have to be aged 18 when your course starts but there is no (13) . Currently the Open University has around (14) undergraduate and more than 30,000 postgraduate students, of which 10,000 have (15) . Nearly all students are studying (16) . About 70 per cent of undergraduate students are in (17) . More than 50,000 students (18) by their employers for their studies. Most distance learning courses (19) . Some of them are even available in other parts of the world. With over 25,000 of its students living outside the UK, the Open University is the (20) that offers distance learning throughout the world.

8（）

海天公司去年的销售额是195万元，税后利润为销售额的4%，购货付款期限是20天，但其应付账款项目中是60天的购货额。公司经理想从银行借款以正常履行信用义务，即只有20天的应付账款。公司资产负债表如下表所示：

海天公司资产负债表 单位：千元
资 产	金额	负债及所有者权益	金额
货币资金 应收账款 存货 流动资产 土地和建筑 设备	25 125 650 800 250 250	应付账款 银行借款 应付账款 流动负债 长期借款 股本 留存收益	300 250 125 675 250 125 250
资产总计	1300	负债和权益总计	1300

要求：
(1)若想避免逾期付款，需要向银行借多少钱
(2)公司会得到这笔借款吗

在钢结构中常用（）轧制成钢板、钢管、型钢来建造桥梁、高层建筑及大跨度钢结构建筑。

A.碳素钢

B.低合金钢

C.热处理钢筋

D.冷拔低碳钢丝

如何对活塞杆填料函进行检修？