坡地草坪主要选择覆盖力强、()抗瘠薄、具有匍匐性、扎根和固土性强的草坪草。
A.耐寒
B.耐碱
C.耐旱
参考答案:C
He doesn’t drive a car ______ his brother.
A.as good as
B.as well as
C.as better as
D.as best as
用化学用语填空:
(1)天然气的主要成分______;
(2)5个硫酸根离子______;
(3)汽水中能使紫色石蕊试液变成红色的物质是______.