（文）若cos（π-A）=-12，则sin（π2+A）的值是（ ） A．32 B．-

疖肿发于夏秋季节，局部红肿结块，灼热疼痛，舌苔薄腻，脉滑数，主方宜选（）

A.五味消毒饮

B.黄连解毒汤

C.清暑汤

D.仙方活命饮

E.牛蒡解肌汤

提起森林的好处人人都知道很多，科学家们形容森林具有六种“机器”功能，你能利用所学的知识对这些功能作出解释吗?

（1）“吞云吐雨器”                             。

（2）“吞碳吐氧器”                           。

（3）“消声器”                                。

（4）“除尘器”                               。

（5）“空调器”                                。

（6）“造药器”                             。

再次体液免疫应答发生的场所为()
各种免疫细胞的发源地为()
B淋巴细胞分化成熟的部位为()
T淋巴细胞分化的部位为()
成熟淋巴细胞定居的部位为()

A．骨髓

B．胸腺

C．法氏囊

D．周围免疫器官

E．淋巴结

I arrived at the bus station much too early for the London bus, which was not to leave until five to twelve. I pushed through the crowds, looking for somewhere to sit down. Scores of people were standing about, or struggling along with their bags and the cases to find the right lines. There was a party of school girls. I could see teachers trying to keep them in order. But there was nowhere for me to sit.

I stepped into the station buffet. I looked up at the clock there. It was only twenty to twelve. I found a seat opposite a large mirror on the wall. Just then a friend of mine called Jim came in and sat with me. "What time is your bus?" asked Jim. "Oh, there's a plenty of time yet," I answered. "Oh, I'll get some drinks then," said Jim. We talked while drinking. Then I looked at the clock again. "Good heavens! It's going backward!" I cried. "A moment ago it was twenty to twelve and now it's half past eleven." "You are looking at the clock in the mirror," said Jim. I could kick myself for being so stupid. I had not realized that the marks for one and eleven on the face of the clock were the same. The next bus was not to leave for another hour. I have never liked mirror since then.

小题1: The London bus left ________. 

A．at five to twelve

B．before five to twelve

C．after five to twelve

D．until five to twelve小题2:The writer went to the station buffet because ________.

A．he was thirsty

B．he saw the station buffet was not so crowded

C．it was still early for his bus and he couldn't find a place to sit at the bus station

D．he had changed his mind; he wouldn't go to London小题3: The writer sat ________.

A．behind a mirror

B．facing a mirror

C．under a mirror

D．near a mirror小题4: Jim came to the station buffet at about ________.

A．twenty to twelve

B．twenty past twelve

C．half past one

D．twenty past eleven小题5:What time was it when the writer looked at the clock again?

It was ________.                                       

A．half past eleven

B．twelve thirty

C．twelve twenty

D．eleven thirty

箱包交接时，交接双方必须首先通过（）。

A.锁具检查

B.箱体检查

C.身份认证

D.以上均不对