四纹豆象的形态特征包括()。
A、体长一般不超过3mm
B、雌、雄虫触角均为锯齿状
C、雌、雄虫触角均为梳齿状
D、前胸背板后缘中央的瘤状突突起不明显
参考答案:B, D
A description least likely to explain put-call parity is:()
A.A fiduciary call option strategy and a protective put option strategy for an underlying asset are equal in value.
B.A put is equivalent to a long call, a long position in the underlying asset, and a long position in the risk-free asset.
C.A call is equivalent to a long put, a long position in the underlying asset, and a short position in the risk-free asset.
治疗铁缺乏应该多吃的食物是()。
A.鱼、蛋、蔬菜和水果
B.瘦肉、动物全血、鸡蛋
C.牛奶、大豆及其制品
D.营养素强化食品
E.酸奶、肉松和骨粉