左上肺脓肿，行肺叶切除术，气管导管应选用（）。 A.无套囊气管导管 B.右侧或左侧双

潮州灯谜的体裁种类多，基其中最富有文学艺术价值的是（）。

先化简，再求值：﹣2（mn﹣3m²）﹣[m²﹣5（mn﹣m²）+2mn]，其中|m﹣1|+（n+2）²=0

该图所示南半球某岛屿面积约为15 万Km²。读图，回答问题。

小题1:关于该岛屿的自然地理特征，说法正确的是

①以山地丘陵为主  

②终年受东南信风控制，降水丰富 

③河流短小湍急，落差大，水力资源丰富  

④该岛植被为亚热带常绿阔叶林  

A．①②

B．②③

C．①③

D．②④小题2:该岛屿西部以畜牧业为主，东部以种植业为主，形成此种差异的主要因素是

A．光热条件

B．土壤

C．交通

D．水源小题3:该岛西南部的峡湾地质国家公园最有特色的是

A．风力侵蚀地貌

B．流水堆积地貌

C．火山地貌

D．冰川侵蚀地貌

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop".

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) . She had only one small, flat bag with a few candies—fiftycent candies! I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

5（）

A.improvement 

B.problem 

C.surprise 

D.excitement

自助注册客户的安全认证方式为（）。

A.K宝

B.动态口令卡

C.用户名和登录密码

D.证书