—Don't be late _______ class again, OK?
—Sorry, I won't. [ ]
A. for
B. in
C. by
D. to
答案:A
-How much is _______ for a schoolbag?
-Experts say students should carry_______ more than 10 or 15 percent of their body weight.[ ]
A.far more; no
B.too much; not
C.very much; any
D.many more; much
某项目拟建于丘陵地区,年工作日为360天,执行《环境空气质量标准》二级标准,经工程分析核算其NO2排放量为3.200t/a,其SO2排放量为28000t/a,据此判别该项目大气环境评价等级。( ) (已知:《环境空气质量标准》NO2 1h平均浓度二级标准限值为0.24 mg/m3,SO21h平均浓度二级标准限值为0.50mg/m3)
A.一级
B.二级
C.三级
D.四级