关于关键人物的人数与集团级别匹配正确的有（） ["A类集团（含A+、A1、A2）不少于5人","B类（含B1、B2）不少于2人","C类不少于1人"]
《汉语拼音方案》一共规定了（）个汉语拼音字母。 ["26","27","28","29"]
电网中的无功电源不包括（） ["同步发电机","同步电动机","异步电动机","高压架空线路和电缆线路的对地电容"]
Harry, who had failed in the final exam, had a great worry（）his mind. ["on","in","with","at"]
防滑扣件是指根据抗滑要求增设的（）用途扣件。 ["连接","连接并防滑","非连接"]
GSM手机一般以2DB为一等级来调整它们的发送功率，GSM900移动台的最大输出功率是（）W。
