什么叫抗互调干扰？

一个字节等于( )个二进制位数。

甲、乙两同学为探究SO。与可溶性钡的强酸盐能否反应生成白色BaSO₃沉淀，用下图所示装置进行实验(夹持装置和A中加热装置已略，气密性已检验)。

实验操作和现象：

(1)A中反应的化学方程式是______。

(2)C中白色沉淀是______，该沉淀的生成表明SO₂具有______性。

(3)C中液面上方生成浅棕色气体的化学方程式是______。

(4)分析B中不溶于稀盐酸的沉淀产生的原因，甲认为是空气参与反应，乙认为是白雾参与反应。

①为证实各自的观点，在原实验基础上：

甲在原有操作之前增加一步操作，该操作是______。

乙在A、B间增加洗气瓶D，D中盛放的试剂是______。②进行实验，B中现象：

检验白色沉淀，发现均不溶于稀盐酸。结合离子方程式解释实验现象异同的原因：

(5)合并(4)中两同学的方案进行实验，B中无沉淀生成，而C中产生白色沉淀，由此得出的结论是______。

阅读理解。

     Lisa goes shopping with her mother. Her mother wants to buy some food. Lisa wants to buy a

new skirt. They come to a shop. Lisa and her mother go in. There are many people in the shop. Lisa

finds a nice pink skirt. "How much is the skirt?" Lisa asks the girl in the shop."It's ninety yuan.""That's

too dear. Can I find a cheap one?"" What about the green one? It looks nice.  And it's only thirty yuan."

"OK, I'll take it. Thanks a lot.""You are welcome." After that, Lisa buys some school things, too. Her

mother buys a lot of food, like bread, cakes, meat and fish.

1. Lisa goes shopping with _____.      

A. her sister    

B. her friend    

C. her mother  

D. her father

2. Lisa wants to buy a new _____ .       

A. shirt      

B. skirt     

C. bag      

D. hat

3. The pink skirt is _____        

A. ￥30    

B. ￥9    

C. ￥80    

D. ￥90

4. Lisa buys a _____ skirt.       

A. white     

B. green      

C. red        

D. dear

5. The green skirt is _____.       

A. nice but dear                  

B. nice and cheap      

C. not nice but cheap              

D. not nice or cheap

男，35岁，出现反复发热伴双下肢溃烂半年，入院后做培养发现是孢子丝菌。追问病史有嫖娼史。

下一步应做什么检查()

A．血糖

B．抗-HIV抗体测定

C．X线胸片

D．病理活检

E．血尿常规

医师注册后受吊销医师执业证书行政处罚决定的

A．从事医师执业活动
B．中止医师执业活动
C．申请执业医师注册
D．不予医师执业注册
E．注销执业医师注册