在DNA复制中起主要作用的酶是（） A.DNA聚合酶Ⅰ B.DNA聚合酶Ⅱ C.拓扑

“神舟”六号飞船成功发射、安全返回并顺利完成预计任务，中国在迈向世界航天大国进程中揭开了新的一页。其背后的支撑是[ ]

A、坚持中 * * 党的领导           

B、坚持社会主义道路

C、中国日益增强的综合国力         

D、坚持人才强国战略

四、逻辑判断。每题给出一段陈述。这段陈述被假设是正确且不容置疑的，要求你根据这段陈述选择一个答案。注意正确的答案应与所给的陈述相符合，不需要任何附加说明即可以从陈述中直接推出。

请开始答题。

德国经济在席卷全球的金融危机中受到的冲击与其他发达国家相比较小，主要原因是德国经济建立在先进制造业的基础上，德国的机械装备和汽车制造业保持了很强的竞争力。一些人根据德国的例子得出结论，即只有具备强大的制造业竞争水平，一个国家的经济才有高度的稳定性。
如果以下各项为真，哪项能够质疑上述结论？( )

A．某国制造业不发达，该国经济一直动荡不安
B．有些制造业不发达的国家在金融危机中受影响较小
C．有些国 * * 持长期经济稳定，却没有发达的制造业
D．有些国家制造业很发达，但经济并没有长期保持稳定

Motherhood may make women smarter and may help prevent dementia in old age by bathing the brain in protective hormones, US reseachers reported on Thursday.
Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s. University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans.
"Our research shows that the hormones of pregnancy are protecting the brain, including estrogen, which we know has many neuroprotective effects, " Kinsley said.
"It’s rat data but humans are mammals just like these animals are mammals, " he added in a telephone interview. "They go through pregnancy and hormonal changes. "
Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline.
"When people think about pregnancy, they think about what happens to babies and the mother from the neck down, " said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida.
"They do not realize that hormones are washing on the brain. If you look at female animals who have never gone through pregnancy, they act differently toward young. But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations to the brain. \

What can protect the brain of a woman according to the passage

A. Estrogen.
B. The hormones of pregnancy.
C. More exercise.
D. Taking care of children.

国际结算的当事人可以是（）

A.个人

B.事业单位

C.社会团体或政府

D.企业单位

IC卡油站管控使用的操作系统是：（）.

A.windows

B.turbolinux

C.dos