更多"bone age"的相关试题:
[填空题]Age Structures in Mexico and Sweden
Age structure refers to the percentage of the population in different age
(1)______Mexico’s age structure is quite different from Sweden’s in (1)______
that the former is like a (2)______with a wider base. In Sweden, the age (2)______
structure is shaped like a rectangle, which results from a(n) (3)______ (3)______
birth rate and low death rate in early and middle age. In Mexico, the
population is expanding rapidly. In Sweden, the population is stable in size
with a(n) (4)______distribution. (4)______
The Effects of Different Age Structures:
--Age structures affects population growth:
a) A country with a larger percentage of people at the bottom of the
pyramid will have a (5)______population growth rate. (5)______
b) a larger proportion of women of (6)______age results in a faster (6
[单项选择]Although custom prosthetic bone replacements produced through a new computer-aided design process will cost more than twice as much as ordinary replacements, custom replacements should still be cost-effective. Not only will surgery and recovery time be reduced, but custom replacements should last longer, thereby reducing the need for further hospital stays.
Which of the following must be studied in order to evaluate the argument presented above
A. The amount of time a patient spends in surgery versus the amount of time spent recovering from surgery.
B. The amount by which the cost of producing custom replacements has declined with the introduction of the new technique for producing them.
C. The degree to which the use of custom replacements is likely to reduce the need for repeat surgery when compared with the use of ordinary replacements.
D. The degree to which custom replacements produced with the new technique are more carefully manufactured than are ordinary replacements.
E. (E) The amount by which custom replacements produced with the new technique will drop in cost as the production procedures become standardized and applicable on a larger scale.
[填空题]Obviously, recruiting voluntary bone marrow donors in mainland China is ______.
[简答题]
From a very early age, perhaps the age of five or six, I knew that when I
grew I should be a writer. Between the ages of about seventeen and twenty-（1）
four I tried to abandon this idea, but I did so with the conscience that I（2）
was outraging my true nature and that soon or later I should have to （3）
settle down and write books.
I was the child of three, but there was a gap of five years on the（4）
either side,and I barely saw my father before I was eight. For this and other reasons
I was somewhat lonely, and I soon developed disagreeing mannerisms which（5）
made me unpopular throughout my schooldays. I had the lonely child's habit of
making up stories and holding conversations with imaginative persons, and （6）
I think from the very start my literal ambitions were mixed up with the （7）
feeling of being isolated and undervalued. I knew that I had a facility with
words and a power of
