通过学习而形成的合乎法则的操作活动方式被称作()
A.操作技能
B.技巧
C.操作能力
D.能力
参考答案:A
Daniel's family () their holiday in Huangshan this time next week.
A. are enjoying
B. are to enjoy
C. will enjoy
D. will be enjoying
简述传染性非典型肺炎的症状和体征。