通常材料气味检测分（）个等级，至少（）人进行评估。
A.4；3
B.6；3
C.6；5
D.8；5
参考答案：B
The earthquake _____Japan on March 11 was so strong that it caused many deaths and losses. [ ]
A. to attack
B. that attacked
C. being attacked
D. attacking
把土地分为生地和熟地的依据是（）。
A.土地的社会经济用途
B.土地的开发程度
C.土地的利用程度
D.土地的经济地理位置
