滤饼厚而松滤失量就大。

下图是一个细胞的亚显微结构模式图，请据图回答下列问题。

(1)根据其结构特点，该细胞主要分布于植物体的_________________。

(2)如果该植物细胞是从一朵红色花瓣上取下的，则决定其红色的花色甙存在于哪个标号所示的结构上？______________。

(3)将该细胞放在含有³H标记的培养液中保温一段时间后，可测到³H的结构有_____________(填标号)。

(4)经测定，该细胞的细胞液中所有溶解于细胞液中的物质的浓度为0.2mol/L，若将该细胞置于0.3g/mL蔗糖溶液中，片刻后将发现有________现象。

(5)结构2的特点是具有一定的流动性，如果降低温度，流动性将_______。

(6)该细胞与叶肉细胞相比，在颜色上的区别是________。

(7)在该细胞中不具膜结构的细胞器是________(填标号)，如果在该细胞器上合成的物质中含有50个氨基酸，则在该细胞器上将会有____个水分子生成。

2010年04月10日，波兰总统卡钦斯基乘坐的“图-154专机”在俄罗斯西部坠毁，机上96人不幸全部遇难，有关方面迅速展开搜救行动，特别是寻找“黑匣子”．若飞机“黑匣子”能在30日之内不断地向外发出频率是37.5kHz的电磁波，则该电磁波在真空中的波长为______m．

This was one of my experiences (1) . When I was in my 30s, I was working for a large international company which had its head office in London. I was working in the (2) department.
The company had a training centre which was just outside London. Different courses were held there throughout (3) and I (4) go on one training course a year. These usually started (5) a Sunday evening and lasted six days.
Once I was (6) a week’s training course with about forty (7) sales people. I was in the bar on the Friday evening and suddenly a woman who was (8) behind the bar asked mea curious question. "I hope you don’t (9) my asking," she said, "but I’ve been (10) about it all week. Have you got a sister (11) Mary" The woman’s name was June. And she used to do various jobs at the training centre. She worked in the office, she organized all the food and drink for the centre and she worked in the bar at lunchtime and in the evening.
My answer (12) June’s question was "Yes", and June said, "I thought (13) . I met her last September when she was organizing a course here. " At that time, my sister was working for (14) company but in a different part of the country. That was (15) she came to be at the training centre.
(16) surprised me was how June guessed we were brother and sister. Three things made it even more (17) . First, she had met my sister six months before she met me. Second, they have about sixty new people every week at the training centre. So about one thousand five hundred people had (18) the centre in those six months. And (19) , my sister is married, so she doesn’t have the same family name as me.
We’re not (20) , but I guess we must look quite like each other.

A．finally
B．at the end
C．at last
D．later

下列哪项可称为真性细菌尿？（）

A.清洁中段尿细菌定量培养≥10³/ml

B.膀胱穿刺尿细菌定性培养阳性

C.晨尿细菌定性培养阳性

D.清洁中段尿细菌定性培养阳性

E.尿沉渣镜检白细胞>5个/HP

RS-232是DTE和DCE之间的接口标准，当作为DCE的Modem和作为DTE的计算机相连时，按此标准需要连接的最少线数是 (11) 。Modem收到呼叫信号后向计算机发送的信号是 (12) 。当数据发送完毕，计算机向Modem发送的信号是清除 (13) 、Modem随后向计算机发送清除 (14) 信号作为应答。当使用RS-232通信时，通常需要使户速率匹配功能，完成该功能的协议是 (15) 。

A．接收数据

B．载波检测

C．MODEM就绪

D．呼叫(振铃)指示