You had better___ the teacher’s advice.

A.chance

B.lift

C.offer

D.luck

A.NK细胞与靶细胞

B.树突状细胞与Th细胞

C.Th细胞与B细胞

D.CTL细胞与靶细胞

E.巨噬细胞与Th细胞

A.＜br＞

B.＜tr＞

C.＜th＞

D.＜td＞

A.由下丘脑-垂体-甲状腺轴异常所引起

B.TSH释放降低

C.T3/T4水平降低

D.甲状腺结合蛋白(TBG)水平升高

E.外周TH抵抗

She had said what ________________(一切有必要说的话).

_______in the office had a mistake, and the firm regretted causing the customer inconvenience.

A) Someone B) Some C) Anyone D) One

__________ seeing the damage he had done, the child felt ashamed.

A) By B) On C) At D) For

__ had it acted responsibly.

A) neither B) so

C) either D) both

I had just started back for the house to change my clothes ___________ I heard voices.

A) as B) when C) after D) while

in my work, and I had an equal admiration for the stories of his time.

A)splendid B)weighty C)vague D)keen