水绵细胞的一个最明显的特征是 [ ]
A.细胞呈长方形
B.细胞核很大
C.液泡很大
D.有螺旋形的叶绿体
答案:D
You were my ______ when I was weak; you were my voice when I couldn’t speak.
A.ability
B.strength
C.energy
D.force
只取得金融期货经纪业务资格的期货公司,可以向期货交易所申请()资格。
A.非结算会员
B.全面结算会员
C.特别结算会员
D.一般结算会员