"Twenty-four hours later I can find about six in the greenhouse after releasing a bag of 1,500," Cranshaw said. "Which means 1,494 largely vanished somewhere in that period. And I do not see any laying eggs for a few weeks." Mature ladybugs will feed on 20 to 25 aphids per day, ...
in order to not B. in order not to C. so that not to D. so that I won't 查看答案和解析>> 科目:来源:题型:单选题 How long have you ___ the tape recorder? A. had B. found C. bought D. borrowed 查看答案和解析>> 科目:来源...