[单项选择]

For the first time, stem cells purified from fat have been used to heal an injury in a living animal. Michael Longaker of Stanford University in California and his team showed in mouse experiments that so-called adipose derived adult stromal (ADAS) cells purified from a rodent’s belly fat could be coaxed to heal a skull fracture too large to mend by itself.
The power of ADAS cells to transform into bone, cartilage and even neurons has been studied for years in test tubes. But Jeffrey Gimble, who studies human ADAS cells at Louisiana State University in Baton Rouge says Longaker’s report is an important step forward. "Actually repairing a defect in an animal model had never been done. This is an excellent study." If the same technique works in humans, these cells could be coaxed to mend broken bones and correct other defects in tens of thousands of surgical procedures each year in which bone grafts and prosthetics are now necessary.
Longaker&r
A. his work made an unprecedented achievement in the field
B. he proved that ADAS cells contributed a lot to cell therapy
C. his work paved way for ADAS cell application in clinical trials
D. he cured an animal defect that had never been repaired before

[单项选择]

For the first time, stem cells purified from fat have been used to heal an injury in a living animal. Michael Longaker of Stanford University in California and his team showed in mouse experiments that so-called adipose derived adult stromal (ADAS) cells purified from a rodent’s belly fat could be coaxed to heal a skull fracture too large to mend by itself.
The power of ADAS cells to transform into bone, cartilage and even neurons has been studied for years in test tubes. But Jeffrey Gimble, who studies human ADAS cells at Louisiana State University in Baton Rouge says Longaker’s report is an important step forward. "Actually repairing a defect in an animal model had never been done. This is an excellent study." If the same technique works in humans, these cells could be coaxed to mend broken bones and correct other defects in tens of thousands of surgical procedures each year in which bone grafts and prosthetics are now necessary.
Longaker&r
A. They are easy to operate
B. Their abstraction causes no pains
C. They grow fast
D. Their yields are large

[单项选择]

For the first time, stem cells purified from fat have been used to heal an injury in a living animal. Michael Longaker of Stanford University in California and his team showed in mouse experiments that so-called adipose derived adult stromal (ADAS) cells purified from a rodent’s belly fat could be coaxed to heal a skull fracture too large to mend by itself.
The power of ADAS cells to transform into bone, cartilage and even neurons has been studied for years in test tubes. But Jeffrey Gimble, who studies human ADAS cells at Louisiana State University in Baton Rouge says Longaker’s report is an important step forward. "Actually repairing a defect in an animal model had never been done. This is an excellent study." If the same technique works in humans, these cells could be coaxed to mend broken bones and correct other defects in tens of thousands of surgical procedures each year in whic
A. his work made an unprecedented achievement in the field
B. he proved that ADAS cells contributed a lot to cell therapy
C. his work paved way for ADAS cell application in clinical trials
D. he cured an animal defect that had never been repaired before

[填空题]Fat cells

[判断题]Fat cells block body heat from escaping quickly.

[填空题]Issues in dialect usually stem from the debate over what people view as
Standard American English and what they do not view as Standard American
English. Although people come from different backgrounds and have had 41. ______
different experiences, which becomes a particular problem for communication. 42. ______
Issues arise that confronts people every day in all jobs and in most dealings 43. ______
with other people.
According to Walt Wolfram and Donna Christian’s Dialects and Education,
the term dialect it has several "popular" meanings that stem from the 44. ______
technical definition of dialect. Often people infer to dialect when talking 45. ______
about the way people from certain regions or certainly social groups speak. 46. ______
While this is part of it, it is the entire definition. Other times people 47. ______
refer to people who are speaking different