当()或塑料窗组合时,其拼樘料的尺寸、规格、壁厚应符合设计要求
A.木门窗
B.钢门窗
C.铝合金门窗
D.金属窗
参考答案:D
Eat _______ cake you like and leave the others for _______ comes in late.
A.whichever; whoever
B.whatever; anyone
C.any; who
D.no matter what; no matter who
根据Lotka-Volterra模型,当K1>K2/β,K2A.物种1获胜B.物种2获胜C.两个种群共存D.出现不稳定平衡
A.物种1获胜
B.物种2获胜
C.两个种群共存
D.出现不稳定平衡