制动轮直径磨损到比原直径小（）时，应重新加工恢复原来的表面硬度才能使用。 l～2毫米。 2～3毫米。 3～4毫米。
各级领导干部必须严以修身、（）、严以律己，谋事要实、（）、做人要实，经得起权力、金钱、美色考验，用党和人民赋予的权力为人民服务。
简述生物标志物及其分类。
蒂蒙斯提出的创业三要素是（）、（）、（）。
You are the administrator of your company’s network. The dial-up server on your network is configured to support certificate authentication. A user named Tom wants to use smart card authentication on his Windows 2000 Professional portable computer. You that Tom’s computer has a PC Card smart card reader and the appropriate drivers installed. You give Tom a smart card to use. What else should you do to enable smart card authentication on Tom’s computer? （） Configure a dial-up connection to use EAP. Select the smart card device for authentication. 。 Configure a dial-up connection to use SPAP. Select the smart card device for authentication.。 Configure a dial-up connection to use certificate authentication. Enable the usercredentials for authentication.。 Configure a dial-up connection to connect to a private network through the Internet. Enable L2TP be create a virtual private network （VPN） tunnel.。
婴幼儿喂养时告知家长4个月时可逐渐增加的食物是：（）
