雌蟑螂在交配后,一般隔多久可以产出卵鞘() ["10天","30天","40天","60天"]
指示剂的僵化是指指示剂与()。 ["金属离子形成的络合物稳定常数太大","金属离子形成的络合物稳定常数太小","EDTA的络合能力相近","金属离子形成的络合物溶解度太小"]
一p∧q的等值判断有()。 ["p→q","一<\/sup>(p←q)","一<\/sup>(p→q)","一<\/sup>(p∨q)","一<\/sup>(q→p)"]
水披覆转印
蟑螂成虫在羽化后,一般在多长时间可行交配() ["1个月","2个月","1周","3周"]
“车鼓舞”