在ELISA中,哪一步骤不是ELISA的反应过程,但却是决定试验成败的关键?()
A.温育
B.洗涤
C.结果判断
D.加样
E.做阴阳性对照
参考答案:B
. Not far from the club, there is a garden, its owner __________ in it ___________ bridge with his children every afternoon.
A.seated; plays
B.seats; plays
C.seated; playing
D.seats; playing
寄生关系是指一个种(寄生者)靠寄生于另一个种(寄主)的体内或体表而生活。