小明训练上楼梯赛跑,他每步可上2阶或3阶(不上1阶),那么小明上12阶楼梯的不同 发布时间:2017-06-02 18:40 │ 来源:www.tikuol.com 题型:解答题 问题: 小明训练上楼梯赛跑,他每步可上2阶或3阶(不上1阶),那么小明上12阶楼梯的不同上法有______种.
题型:解答题 从方框内选出短语,并用其适当形式填空。1. Jenny likes to eat lots of fruits, _________ bananas and oranges.2. I want to be a teacher _________ a scientist in the future.3. The two runners took different routes, but they both_______ in the same place.4. When I_______ this morning, it was already nine o’ clock.5. We are_________ a school trip next Sunday. end up, go on, such as, wake up, rather than 查看答案
题型:解答题 患儿,3岁,易患感冒,反复出现左心功能不全的症状,胸骨左缘第2肋间听到响亮粗糙的连续性机器样杂音,向左锁骨下窝或颈部和背部传导,局部可扪及震颤,四肢动脉可扪及水冲脉和听到枪击声。首先应考虑到的诊断是()。A.动脉导管未闭B.室间隔缺损C.房间隔缺损D.法洛氏四联症E.二尖瓣狭窄 查看答案