原始粒细胞、早幼粒细胞和中幼粒细胞均有合成DNA的能力，这类粒细胞应属于（）。 A.

榴石矿石可以看作CaO、Fe₂O₃、Al₂O₃、SiO₂组成，由榴石矿石制取氯化钙和氧化铝的实验步骤如下：

（1）榴石矿加盐酸溶解后，溶液里除了Ca²⁺外，还含有的金属离子是________。

（2）对溶液Ⅰ进行操作时，控制溶液pH＝9～10 （有关氢氧化物沉淀的pH见下表）NaOH不能过量，若NaOH过量可能会导致_________溶解，      沉淀。

氢氧化物	Fe(OH)3	Al(OH)3	Ca(OH)2
开始沉淀pH	1.5	3.3	12.0

（3）写出向沉淀物A中加入过量氢氧化钠溶液的离子方程式                   。

（4）①某同学在实验室中用图1装置制取CO₂气体并通入溶液Ⅱ中，结果没有沉淀产生，可能的原是              ；为了能产生沉淀，该同学对图1装置进行了改进，改进的方法为         。

②若将二氧化碳气体通入澄清石灰水中，石灰水变浑浊，混合体系中除存在电离平衡、水解平衡外，还存在溶解平衡，用方程式表示该溶解平衡关系                           。

We all found _______ to play the game.

A. that interested B. this interesting C. it interesting D. it's interesting

如图1 所示，某校园网使用l0Gbps 的POS 技术与CERNET 相连，POS 接口的帧格式使用SDH。路由协议的选择方案是校园网采用OSPF 动态路由协议，校园网与CERNET的连接使用静态路由协议。另外，还要求在路由器R3 上配置一个loopback 接口，接口的IP 地址为192.167.150.1。

请阅读以下R3 的配置信息，并补充【6】，一【10】空白处的配置命令或参数，按题目要求完成路由器的配置。 Router-R3 #configure teminal Router-R3 (canfig)# Rauter-R3 (config)#interface pos3/1 Router-R3 (conflg-if)#descript..ion To CERNET Router-R3 (config-if)#bandwidth eses Routes-R3 (conlig-i0#ip address 222.112.37.1 255.255.255.252 【6】- Routes-R3 (config-if)#crc 32 Routes-R3 (config-ifj#【7】 一配置帧格式 Routes-R3 (config-if)#na ip directed-broadcast Routes-R3 (config-i}#pos flag s1s0 2 Routes-R3 (config-ill#no shutdown Routes-R3 (config-ifl#exit Routes-R3 (canfig)#interface loopback 0Router-R3 (conflg-i介#ip address 192.167.150.1Router-R3 (config-i0#no ip route-cache【8】Router-R3 (config-if)#no ip_mroute-cacheKouter-R3 (config-i 匀#exitRouter-R3 (config)#router ospf 63Router-R3 (config-router)#network 167.112.0.0 【9】Router-R3 (config-router)#redistribute connected metric-type 1 subnets一-area 0Router-R3 (config-router)#area 0 range 167.112.0.0Router-R3 (con,tg-router)#exit【10】Router-R3 (config)#Router-R3 (config)#ip route 0.0.0.0 0.0.0.0 222.112.37.2Router-R3 (config)#exitRouter-R3#write

All her life, my mother wanted busy children. It was very important that her house should remain at all times clean and tidy.

You could turn your back for a moment in my mother’s house, leave a half written letter on the dining table, a magazine open on the chair, and turn around to find that my mother had "put it back where it belonged," as she explained. My wife, on one of her first visits to my mother’s house, placed a packet of biscuits on an end table and went to the kitchen to fetch a drink. When she returned, she found the packet had been removed. Confused, she set down her drink and went back to the kitchen for more biscuits, only to return to find that her drink had disappeared. Up to then she had guessed that everyone in my family held onto their drinks so as not to make water rings on the end tables. Now she knows better.

These disappearances had a confusing effect on our family. We were all inclined to forgetfulness, and it was common for one of us, upon returning from the bathroom, to find the every sign of his work in progress had disappeared suddenly. "Do you remember what I was doing" was a question frequently asked, but rarely answered.

Now my sister has developed a secondhand love of clean windows, and my brother does the cleaning in his house, perhaps to avoid having to be the one to lift his feet. I try not to think about it too much, but I have at this later time started to dust the furniture once a week.

My wife could not find her biscuits and drink in my mother’s house because（）

A．she had already finished them

B．my mother had taken them away

C．she forgot where she had left them

D．someone in my family was holding them

为了有效地防护高频电磁场污染，通常采用的方法是（）。

A.整体屏蔽

B.穿好工作服

C.戴好手套

D.穿好绝缘鞋