病毒性肝炎发展为慢性见于（） A.甲型 B.丙型 C.戊型 D.己型

圆珠笔和铅笔的价格比是2：1，5支圆珠笔和6支铅笔共用8元．问圆珠笔的单价是每支多少元？

根据语境，用恰当的语言完成对话。

（The entrance exam for secondary school (中考)is over. The summer holiday is coming. Now Peng Lan is talking to Liu Qiang happily at home.)

Peng Lan=P      Liu Qiang=L

P: Hey, Liu Qiang. Our junior high school life has come to an end. What are you going to do this summer vacation?

L: 小题1:__________________________________. The scenery there is very beautiful.

P: Sounds great. It’s considered as the Treasure Island of China. 小题2:______________________?

L: I’ll go to Mount Ali, Sun Moon Lake and some other tourist attractions. And I want to see Tuantuan and Yuanyuan.

P: 小题3:____________________________________________?

L: By ship. You know the policy is much better than before. People from the mainland can fly or take a ship there. I prefer to go there by ship.

P: 小题4:_____________________________. It’s a little more slowly but interesting. Well, it’s reported the farmers can sell their fruits to the mainland. It not only helps the farmersf earn money, but also makes a contribution to the communication between Taiwan and the mainland.

L: That’s right. I hope our country can unite early.

P: Me, too. 小题5:_________________________________________?

L: In half a month. My parents will go with me.

P: Well, don’t forget to bring back some various delicious fruits from Taiwan.

L: Of course not.

女，26岁，尿频、尿急、尿痛3年。尿常规检查：红细胞（+），脓细胞（+++）。尿普通细菌培养阴性。排泄性尿路造影：右肾未显影，右肾区见散在片状高密度阴影，左肾积水，膀胱小如乒乓球。诊断应考虑（）

A.右肾结核

B.右肾结石

C.双肾结核

D.左肾结

E.右肾肿瘤

能明确诊断烟雾病的检查是（）

A.颅脑CT

B.颅脑MRI

C.颅脑MRA

D.PET

E.颅脑DSA

美国A公司(卖方)与中国B公司 (买方)签订货物买卖合同，双方约定价格条件为CFR(大连)。货物由C公司承运，在该贸易中，对于货物的保险费用由谁来支付( )

A．A公司

B．B公司

C．A、B双方共同承担

D．C公司承担