更多"[单选题] Hearing his mother’s voice, t"的相关试题:
[单项选择]If Mark Twain couldn't find his ticket, ______.
[单项选择]He couldn' t use his own car because it ______ then.
A. was being repaired
B. was repairing
C. is repairing
D. has been repaired
[单项选择]Seeing the ______ scene, the ______ child held his mother's arm tightly.
A. frightened; frightening
B. frightening; frightening
C. frightening; frightened
D. frightened; frightened
[单项选择]Her voice is child-like, with a West Country ______.
A. tilt
B. lilt
C. lobe
D. loft
[单项选择]The child couldn't comprehend the profound text book.
A. interpret
B. read
C. understand
D. translate
[单项选择]To judge a child's standard, his marks in a test must be compared with marks gained by ______.
A. others of the same age
B. older children
C. younger children
D. adults
[单项选择]The student ______ his head when he couldn't answer the question.
[填空题]He rescued the child（ ）the risk of his own life.
at
[单项选择]My younger brother couldn't help ______ when his toy car fell into the river.
A. crying
B. to cry
C. cry
D. cried
[单选题]It is a wise father that knows his own child,but today a man can boost his paternal（fatherly）wisdom–or at least confirm that he's the kid's dad.All he needs to do is shell our$30 for paternity testing kit（PTK）at his local drugstore–and another$120 to get the results.More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years,according to Doug Fog,chief operating officer of Identigene,which makes the over-the-counter kits.More than two dozen companies sell DNA tests Directly to the public,ranging in price from a few hundred dollars to more than$2,500.Among the most popular:paternity and kinship testing,which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption.DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family's geographic roots.Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing.All tests require a potential candidate with whom to compare DN
A.But some observers are skeptical,"There is a kind of false precision being hawked by people claiming they are doing ancestry testing,"says Trey Duster,a New York University sociologist.He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back.Yet most ancestry testing only considers a single lineage,either the Y chromosome inherited through men in a father's line or mitochondrial DNA,which is passed down only from mothers.This DNA can reveal genetic information about only one or two ancestors,even though,for example,just three generations back people also have six other great-grandparents or,four generations back,14 other great-great-grandparents.Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared.Databases used by some companies don't rely on data collected systematically but rather lump together information from different research projects.This means that a DNA database may have a lot of data from some regions and not others,so a person’s test results may differ depending on the company that processes the results.In addition,the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.An appropriate title for the text is most likely to be__________.
A.Fors and Againsts of DNA testing
B.DNA Testing and It's Problems
C.DNA Testing Outside the Lab
D.Lies Behind DNA Testing
[单项选择]We recognized his voice______ he spoke on the radio.
A. while
B. after
C. in case
D. the moment
[单项选择]I can ______ understand Tom because his voice is too low.
A. hardly
B. almost
C. nearly
[单项选择]We recognized his voice ______ he spoke on the radio.
A. while
B. after
C. in case
D. the moment
[单项选择]In the law court, the suspect couldn't ______ his time that night.
A. count on
B. account
C. account for
D. count
[单项选择]Usually a child's behavior is a ______ of his family environment.
A. recognition
B. reflection
C. return
D. record
