根据《建筑施工企业安全生产许可证管理规定》，安全生产许可证有效期满需要延期的，企业应当于期满前（）个月向原安全生产许可证颁发管理机关提出延期申请。
A. 1.0
B. 2.0
C. 3.0
D. 6.0
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智力落后儿童的思维所处的阶段主要是（）。
A. 直观和抽象思维阶段
B. 直观和具体思维阶段
C. 具体和形式运算阶段
D. 具体和发散思维阶段
The Red Hazel Company has received its router from Cisco and is ready to install Cisco Unified CallManager Express. Where will the company find its Cisco Unified CallManager Express software?（）
A. Cisco.com
B. embedded in Flash on the hardware
C. e-mail download from Cisco
D. on a CD-ROM included with installation materials
E. only from a Cisco SE, due to special licensing consideratio
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