配子囊交配是以两个相接的配子囊的全部内容物的融合为特征。()
参考答案:对
过敏性紫癜的表现以下哪项有特征性
A.可出现腹痛,便血
B.反复出现对称性皮肤紫癜
C.起病前1~3周常有上呼吸道感染史
D.可出现血尿和蛋白尿
E.可累及大关节
Mrs Green was so pleased ____ her daughter won the first place in the singing competition.
A.as
B.that
C.when
D.if