制约华北地区农业发展的主要因素是（ ）
A．多高原山地
B．能源不足
C．劳动力资源不足
D．水资源紧张
答案：D
The boy wanted to ride his bicycle in the street, but his mother told him___________ .
A．not to
B．not to do
C．not do it
D．do not to
下面哪个环节不属于业扩流程监控范围？（）
A.新装申请
B.供电方案答复
C.设计审核
D.中间检查
