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【单选题】
下列哪项措施对预防HIV感染无作用A.
加强血液制品管理
B.
使用一次性无菌注射器
C.
禁止性滥交
D.
杜绝吸毒，加强检疫
E.
定期注射丙种球蛋白或胎盘球蛋白
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皮皮学刷刷变学霸
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【简答题】Explain why addition of HNO 3 to concentrated H 2 SO 4 results in the formation of and ions. How could one test experimentally to confirm that such ions exist in H2SO4 solution?
【单选题】Which of the following promises constitutes sufficient consideration in the formation of a contract?
A.
To reimburse the cost of refurbishing a house where the promise in made after the refurbishing has been completed
B.
To lease a house at an annual rent significantly below current market rates
C.
To pay a witness an agreed monetary sum in exchange for attending court
D.
To pay a worker extra remuneration in exchange of continuing to perform their existing contractual duties
【单选题】In the rostrocaudal patterning of nervours system, which of the following molecule plays a key role in the formation of MHB.
A.
Wnt
B.
BMP
C.
Shh
D.
FGF8
【单选题】Participating in the formation of the median sulcus of the forearm is ( )
A.
flexor carpi radialis
B.
flexor ulnar
C.
radius
D.
flexor carpi radialis
【简答题】What's the significance of Puritanism in the formation of America?
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