下列哪项试验方法不能检测血小板聚集能力（）。 A.浊度法 B.电阻法 C.玻璃珠法

解下列方程

8.69+x=12.4

27.2-x=1.6

0.03÷x=1.5

0.8x=1.08．

When my father was getting ready for work, our house was ruled by knocks and words．He used to come downstairs to breakfast．The morning paper lay beside his plate．He always read the “Deaths” first, and then he knocked once on the table．One of my sisters brought his bread, already buttered for him．Usually he said nothing, but once I heard him say, “I love you very much, Edith．I would love more if you buttered my bread on both sides．” He read the paper all through breakfast．Two knocks on the table meant “I am ready for my tea．” If a single knock followed that meant, “More bread, please．”

After breakfast he said, “Boots．” The paper was spread（展开） for him over the back of an arm-chair．Yesterday’s paper was put on the chair for his feet, and his boots were brought to him, freshly cleaned．He read standing at the same time putting on his boots．With one boot finished he said, “Bus．” At that point one of the girls went outside to the garden gate and waited there．Her job was to stop a bus when it came．It came early sometimes and it had to wait for my father．“Overcoat, hat．” One of my sisters had already brushed his overcoat．Now she held it open for him．Another girl came with his hat, nicely brushed．“Handkerchief, pipe（烟斗）．” They were brought and put, with his tobacco（烟草）, into his pocket．He looked out of the window and said either “Walking stick” or “Umbrella”．It was handed to him．Ready now, he was still reading the paper．He didn’t put it down until he heard the shout “Bus coming!” Then he kissed my mother and went out．The girls breathed freely．

How lucky a man was to have a wife and five daughters at home!

68．When the father made the first knock, he meant _______．

A．he had begun to read the morning newspaper

B．he was made to feel sad by the” Deaths” news

C．he would start to read the other parts of the paper

D．his breakfast should begin

69．What does “Edith” mean?

A．A kind of bread．          B．One of the writer’s sisters．

C．The writer．           D．The writer’s mother．

70．All the daughters were quite busy in the morning because _______．

A．their father never helped them

B．their father always gave different instructions at the same time

C．each of them had to start and finish her job just on time

D．they were not clever or quick enough to do their jobs

71．What was the father’s favorite?

A．Reading newspaper．     B．Having bread buttered on both sides．

C．Giving instructions．      D．Being clean and tidy．

下列叙述正确的是( )。

A．线程的执行从run()方法开始，需要调用start()方法运行线程

B．可以通过实现Runnable接口，并且重写start()方法创建线程

C．可以通过继承Thread类，并且重写start()方法创建进程

D．线程执行从start()方法开始，需要通过调用run()方法运行线程

网络的拓扑结构主要是（）

A、网状结构、环形结构和总线结构

B、单环结构、双环结构和总线型结构

C、环形结构、星型结构和总线结构

D、环网结构、单环结构和双环结构