当有危害的化学试剂发生泄漏、洒落或堵塞时应（）。
A、首先避开并想好应对的办法再处理
B、赶紧打扫干净或收拾起来
参考答案：A
加涅将学习结果分为五类：________、________、________、运动技能、态度。
Tom's mother demanded that she ________ everything on time. [ ]
A. would tell
B. tell
C. have told
D. be told
