纳税人的混合销售行为是否属于混合销售，由（）确定。 A.国家税务总局所属征收机关 B

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 does the phrase "litters of pups" mean in the second paragraph

A. Baby rats.


B. Animals.
C. Old rats.



D. Grown-up rats.

颅内压增高的临床表现有哪些?

重要空白凭证的调拨必须坚持（），当面点清.

A.会计主管

B.B级柜员

C.双人在场

某企业于2001年12月12日购入不需安装的设备一台并投入使用。该设备人账价值为600万元，采用年数总和法计提折旧(税法规定采用双倍余额递减法)，折旧年限为5年(与税法规定一致)，预计净残值为零(与税法规定一致)。该企业从2003年1月改用双倍余额递减法计提折旧，所得税采用债务法核算。假定该企业适用的所得税税率为33%，该固定资产折旧方法变更的累积影响数为( )万元。

A．40

B．-26.8

C．53.2

D．-40

支气管肺炎与支气管炎的主要鉴别点在于（）

A.发热程度

B.咳嗽性质

C.咽部情况

D.肺部啰音性质

E.有无合并胃肠道症状