张力性气胸病人抢救的首要措施是气管内插管、上呼吸机。

工程招标人与中标人签署合同时，中标人需要提交（）。

A.履约担保

B.支付担保

C.投标担保

D.抵押担保

语法填空。

    阅读下面短文,按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

     My friend Vernon Davies kept birds. One day he phoned and told me he was going away for a week. He asked me to feed   1   birds for him and said that he would leave the key   2   his front door in my

mailbox.

       3   (fortunate), I forgot all about the birds until the night before Vernon was going to return. What

was worse,    4  was already dark when I arrived at his house. I soon found that the key Vernon gave

me could not unlock either the front door    5   the back door. I was getting desperate. I kept thinking

of   6  Vernon would say when he came back.

     I was just going to give up    7   I noticed that one bedroom window was slightly open. I found a

barrel and pushed in under the window. As the barrel was very heavy, I made a lot of noise. But in the

end, I managed to climb   8  and open the window.

     I actually had one leg inside the bedroom when I suddenly realized that someone   9  

(shine) a torch up at me. I looked down and saw a policeman and an old lady, one of Vernon's

neighbours. "What are you doing up there?" said the policeman.    10  (feel) like a complete fool, I

replied, "I was just going to feed Mr Davies' birds."

169. ____________! It's time to go to school.

A．Hurry up

B．In a hurry

C．Hurry out

D．Don't worry

事故调查结束后，所提出的安全建议的目的是什么？

教育研究的本质特征在于教育理论与实践的创新，主要表现在对未知的探索，对原有（）；（）及研究方法有所突破。