直疝三角的三边是A．腹壁下动脉、联合腱和腹股沟韧带 B．联合腱、腹直肌外缘和耻骨梳韧

各级调度按照（）的原则负责对管辖电网内安全稳定自动装置实施调度运行管理。

A.统一调度

B.分层分区

C.分级管理

D.共同管理

第二节：根据对话内容，从对话后的选项中选出能填入空白的最佳选项。选项中有两项为多余选项。（共5小题；每小题2分，满分10分）（请把答案填在答题卷的横线上）

—Nice to see you, Mary. How are you these days?

—Pretty good, thank you.  61  .

—You’ve finished it? That’s great.  62  What do you think of it?

—I think it is a wonderful description of nature. The book focuses on the struggle between nature and humanity. I find it very educational.

—I think so, too.  63

—Oh, I’m sorry. I have to go now.

—Why?  64

—I have to go to my little brother’s birthday party, or he will be angry with me. Shall we talk about it another time?

—Okay.  65  See you!

A．I come to return the book I borrowed from you.

B．I don’t litk the book at all.

C．How about sitting down and talking about it?

D．I think our conversation is getting so interesting.E．I love books that discuss the struggle between humans and nature.

F．Say “Happy Birthday”to him for me!

G．I’ve been wating to talk to you about the book.

历史，指一切事物（）过程，分自然发展史和人类社会发展史两部分。

下述哪项不是上消化道内镜检查的绝对禁忌证

A．急性胃、食管炎症

B．神志不清或精神不正常

C．心绞痛

D．主动脉瘤

E．哮喘发作期

溶液缓冲槽中的脱硫液应急情况下可以通过放空管放入低位槽。