当出现下列情况( )时，期货交易所可以根据市场风险调整其交易保证金水平。 A．持仓

阻值相等的两根导线甲和乙，已知导线甲比导线乙长，则它们的横截面积大小相比较（　　）

A．甲较大

B．乙较大

C．一样大

D．无法确定

单词拼写。

1.They’ve made an u       request for international aid.

2.After all,it is s       work raising a child.

3.Whether by d       or accident his timing was perfect.

4.In her spare time,she serves as a v       for the 2012 Olympic Games.

5.The Chinese Red Cross S       has offered to send help and relief to the disaster area.

6.These people are very efficient,       (有组织的,有条理的)and excellent time managers.

7.We should seize the opportunity and meet the       (挑战) to push China’s sustainable

(可持续的) development strategy to a new stage.

8.It had been a tense,restless day with people      (催促)her all the time.

9.Some 300 papers were       (提交)at the conference.

10.I heard a faint sound in the      (远处).

《工程建设项目施工招标投标办法》规定，工程建设施工项目投标文件的构成一般包括（）。

A．投标函

B．投标一览表

C．投标报价

D．投标保证金

E．商务和技术偏差表

10岁，学生，1月底因突起高热、剧烈头痛、恶心伴非喷射性呕吐1次入院。体检：神清，全身皮肤散在瘀点、瘀斑，颈项强直，心率120次/分，两肺无异常，腹软无压痛。化验检查：血白细胞计数20×10⁹/L，中性粒细胞0.89，淋巴细胞0.05，单核细胞0.06，最可能的诊断是

A．流行性乙型脑炎

B．细菌性脑膜炎

C．结核性脑膜炎

D．病毒性脑炎

E．流行性脑脊髓膜炎

燃气轮机低压透平转子各部间隙如何测量？