由β溶血性链球菌产生，对中性粒细胞和血小板有免疫毒性作用（）
A.M蛋白
B.脂壁酸
C.红疹毒素
D.链激酶
E.透明质酸酶
参考答案：A
国家测绘局今日正式对新闻界公布，今年三月至五月，中国将再次进行珠穆朗玛峰高程测量，其结果将向全世界公布．国家测绘局专家介绍，中国自一九七五年测定并经国务院批准发布 八千八百四十八点一三米的珠峰高程数据．我国目前对珠峰公认的高度写作______．
A. The chairman asked the board to prepare an outline for the development plan. B. The chairman agreed in general with the development plan proposed by the board. C. The chairman described what the company would do in the years to come. D. The chairman decided to contend against the company’s development strategy.
