功能清热燥湿，又善清心理实热的药物是（）功能清热燥湿，又善清肺热的药物是（）A.龙胆

食品包装的制造材料聚乙烯属于下列物质中的               [ ]

A．天然纤维                      

B．塑料    

C．合成纤维                      

D．合成橡胶

产业重心是区域产业产值空间分布的重心。如图示意中国三次产业重心的经、纬度变化（不含台湾、香港、澳门的统计资料）。完成1~3题。

1．图中①、②、③线依次代表[ ]

A．第一产业、第二产业、第三产业

B．第二产业、第三产业、第一产业

C．第一产业、第三产业、第二产业

D．第三产业、第一产业、第二产业

2．从产业重心的纬度变化看[ ]

A．三次产业重心均向北移动

B．第一产业重心移动最快

C．第二产业重心移动最快

D．第三产业重心移动最快

3．自1985年至2003年，产业重心移动的趋势是[ ]

A．第二产业向东南

B．第二产业向东北

C．第一产业向东南

D．第三产业向东南

Lying in the sun on a rock, the cougar saw Jeb and his son, Tom, before they saw it. Jeb put his bag down quickly and pulled his jacket open with both hands, making himself look big to the cougar. It worked. The cougar hesitated, ready to attack Jeb, but ready to forget the whole thing, too.
Jeb took off his jacket, grasped Tom and held him across his body, making a cross. Now the cougar’s enemy looked even bigger, and it rose up, ready to move away, but unfortunately Tom got scared and struggled free of Jeb.
"Tom, No !" shouted his father.
But Tom broke and ran and that’s the last thing you do with a cougar. The second Tom broke free, Jeb threw himself on the cougar, just as it jumped from the rock. They hit each other in mid air and both fell. The cougar was on Jeb in a flash, forgetting about Tom, which was what Jeb wanted. Cougars are not as big as most people think and a determined man stands a chance, even just with his fists. As the cougar’s claws got into his left shoulder, Jeb swung his fist at its eyes and hit hard. The animal howled(吼叫) and put its head back. Jeb followed up with his other fist. Then out of the corner of his eye, Jeb saw Tom. The boy was running back to help his father.
"Knife, Tom," shouted Jeb.
The boy ran to his father’s bag, while Jeb started shouting as well as hitting, to keep the cougar’s attention away from Tom. Tom got the knife and ran over to Jeb. The cougar was moving its head in and out, trying to find a way through the wall. Jeb was making out of his arms. Tom swung with the knife, into the cougar’s back. It howled horribly and ran off into the mountains.

How did Jeb try to hold the cougar’s attention

A．By keeping shouting and hitting.
B．By making a wall out of his arms.
C．By throwing himself on the cougar.
D．By swinging his fists at the cougar’s eyes.

最早组织开展临床检验室室间质量评价活动的入是

A．Belk和Sunerman

B．Levey和Jenning_s

C．Westgard

D．Whitehead

E．Shewhart

为防御电脑受到病毒侵袭，研究人员开发了防御病毒、查杀病毒的程序，前者启动后能使程序运行免受病毒侵袭，后者启动后能迅速查杀电脑中可能存在的病毒。某台电脑上现装有甲、乙、丙三种程序，已知：（1）甲程序能查杀目前已知的所有病毒；（2）若乙程序不能防御已知的一号病毒，则丙程序也不能查杀该病毒；（3）只有丙程序能防御已知的一号病毒，电脑才能查杀目前已知的所有病毒。（4）只有启动甲程序，才能启动丙程序。根据上述信息，可以得出以下哪项？

A．如果启动了丙程序，就能防御并查杀一号病毒。

B．如果启动了乙程序，那么不必启动丙程序也能查杀一号病毒。

C．只有启动了乙程序，才能防御并查杀一号病毒。

D．只有启动丙程序，才能防御并查杀一号病毒。

E．如果启动了甲程序，那么不必启动乙程序也能查杀所有病毒。