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【单选题】
转移至右下腹,若病变波及腹膜壁层,其腹痛的发生机制是()A.
牵涉痛
B.
反射性腹痛
C.
躯体性腹痛
D.
中枢性腹痛
E.
内脏性腹痛
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【简答题】The most often used reinforcing agents are carbon black and ( ).
【单选题】The use of sinking and dispersing chemical agents for removal of surface oil is ______.
A.
the most common method used in the United States
B.
too expensive for common use
C.
generally safe to sea life
D.
authorized only with prior approval of the Federal On-Scene Coordinator
【单选题】All are alkylating agents used in chemotherapy EXCEPT:
A.
Melphalan
B.
Busulfan
C.
Cladribine
D.
Cyclophosphamide
【单选题】Agents that are used to inhibit bacterial growth are considered
A.
bacteriocidal
B.
bacteriostatic
C.
antiseptics
D.
disinfectants
【单选题】Fire extinguishing agents used on Class C fires must be（）.
A.
able to absorb heat
B.
water based
C.
nonconducting
D.
nontoxic
【判断题】Agents are middlemen who buy in large quantities from the producers and redistribute the goods to the middlemen at the next level retailers.()
A.
正确
B.
错误
【单选题】Before the age of the Internet, we used to ______ our holidays through travel agents.
A.
book
B.
having booked
C.
booking
D.
have booked
【多选题】Hyaluronic acid has been used as agents for
A.
joint diseases
B.
cataracts replacement operation
C.
blood transfusion
D.
cosmetics
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