土壤表面月平均温度最高值出现在()月和()月,最低值出现在()月和()月。
参考答案:7;8;1;2
在建筑石材的性能评价中,下列哪项不正确
A.岩石中SiO2含量越高,耐酸性越强B.岩石晶粒越粗,强度越高C.致密的岩石抗冻性好D.深成岩和变质岩易于取得大材,并可雕琢加工
(),he had to leave school.
A.Sincehisfather’sunemployment
B.Sincehisfatherwasunemployed
C.Hisfatherwasunemployment
D.Becauseofhisfatherwasunemployment