问题 问答题 简答题

试述乳腺癌骨转移形成的途径?

答案

参考答案:

乳腺癌骨转移形成的途径有体循环及Batson静脉系统两条途径。前者为癌细胞通过肺静脉和右心经动脉循环进入骨骼。Batson途径是乳腺癌细胞先侵入肋间静脉再到Batson静脉系统,然后直接到达脊柱、肋骨和颅骨等处,也可逆流到腹腔和盆腔内引起肝脏和骨盆等处的转移。

阅读理解
The following form shows the result of a survey (调查) of parents from five countries, who were asked why children are important to them. They were required to choose three main reasons from seven dealing with personal interests, family relations and social responsibility(责任). Each number in the form is the percentage (%) of parents who chose that particular item(项) as one of their three reasons. Therefore, the most common for Japanese parents are strengthening family ties (Item D, 51%), learning from the experience (Item E, 60%), and raising responsible citizens (Item, G 45%).
Items
Japan
Korea
U.S.A
Britain
France
A.To see oneself continuing in future
35
32
31
17
59
B. To keep the family line
24
68
28
17
26
C. To receive care in old age
10
38
8
7
8
D. To strengthen family ties
51
25
50
55
66
E.To develop oneself through raising one’s children
60
19
54
69
35
F. To enjoy raising one’s children
20
19
50
71
39
G. To raise responsible citizens
45
40
46
28
15
小题1:According to this survey, Korean parents are most interested in         .
A.continuing their familyB.obtaining care in old age
C.strengthening family relationshipD.caring for raising children
小题2:How many items are chosen by parents of more than two countries as main reasons?
A.Two.B.Three.C.Four.D.Five.
小题3:From the percentages in items _______, we can see the following difference between the Asian and the European countries: the Asian parents want to devote themselves to future societies through children; the European parents enjoy the course of raising children.
A.B and CB.D and FC.E and FD.F and G
小题4:According to the form, which of the following is true?
A.From the main reasons shown in the form it seems that in every country parents do not expect care
from children in their old age.
B.Japanese parents share two of their main reasons with the British and American parents, and the third one with Korean parents.
C.More than half of the parents from each country chose the reason“tostrengthen family ties”and for each it was one of the three main reasons for having children.
D.The percentage of French parents selecting the reason“to see oneself continuing in future”is about as high as that of the other countries.
单项选择题 A1型题