工作现场允许的煤气浓度是（）。A．0.03% B．0.3% C．0.5%

Let's go to ________ school.[ ]

A. the    

B. a    

C. /

注射用水的用水点，一定都要加换热器冷却吗？（TZ-99）

_________ going to the exhibition.

A．All but he and me is

B．All but he and me are

C．All but he and I are

D．All but he and I am

酮康唑()
安鲁米特()
美替拉酮()
双氯苯二氯乙烷()

A．可使肾上腺皮质束状带及网状带萎缩、出血、细胞坏死

B．能抑制肾上腺皮质11β-羟化酶，从而抑制皮质醇的合成

C．能抑制胆固醇转变为孕烯醇酮，使皮质激素合成受阻

D．可使皮质类固醇产生量减少

E．抑制ACTH分泌

选做题：读短文填单词。

     Do you like friends who can teach you a lot every day? Books are 1.s_______ friends because they bring

knowledge to us and keep us company through our life. They are so valuable that 2._______ (图书馆) are

built to 3._______ (存放) them. Almost all great men are lovers of books. Franklin said that it was books that

4.1_______ him to success and that he could have achieved nothing 5.w_______ books. Books are the holders

of mankind's 6._______ (经验) and imagination. They enable us to see through the past and predict the

7._______. So when you open a book, you would get into a world 8._______ you have never beer/before. A

good book is a good teacher that 9.h_______ you to get over difficulties. No matter what you are, 10._______

or old, poor or rich, books are your devoted friends. Love books and love life.