在一棵桃树的枝条上开了四朵桃花,它们分别被害虫吃掉了花瓣、花萼、雄蕊和雌蕊,这一枝条上最多可结几个桃子?[ ]
A.4个
B.3个
C.2个
D.1个
答案:B
JD9型电动式呼吸器校验仪的功能是什么?
Which general weather conditions should you expect to find in a low pressure system().
A.Fair weather
B.Precipitation and cloudiness
C.Scattered clouds at high elevations
D.Gradual clearing and cooler temperatures