物资材料保管中的“二齐”是指摆放整齐和库容整齐。
参考答案：对
. Mary had taken _____ to see that her guests had everything that they could possibly want.
A．efforts
B．pains
C．attempts
D．endeavors
柴达木盆和南岭分别属于（ ）
A．第一级阶梯，第二级介梯
B．第一级阶梯，第三级阶梯
C．第二级阶梯，第一级阶梯
D．第三级阶梯，第一级阶梯
