材料堆场要以()为中心,避免发生二次搬运。
A.工人宿舍
B.使用地点
C.现场主人口
D.建筑结构主人口
参考答案:B
用括号中所给单词的适当形式填空。
1. Let go first. (they)
2. I like a bus to school. (take)
3. A plane is than a train. (fast)
4. Our school has two students. (thousand)
5. a lot for your help. (thank)
重度精神发育迟滞患者的心理年龄约为()
A.3岁以下
B.3~6岁
C.6~9岁
D.9~12岁
E.13~16岁