问题
多项选择题
房室结双径路是指（）
A.α（慢）径路传导速度慢而不应期长
B.β（快）径路传导速度快而不应期短
C.正常窦性冲动沿快径路下传
D.α（慢）径路传导速度快而不应期短
E.β（快）径路传导速度快而不应期长
答案
参考答案：C, D, E
搜题请搜索小程序“爱下问搜题”
房室结双径路是指（）
A.α（慢）径路传导速度慢而不应期长
B.β（快）径路传导速度快而不应期短
C.正常窦性冲动沿快径路下传
D.α（慢）径路传导速度快而不应期短
E.β（快）径路传导速度快而不应期长
参考答案：C, D, E
任务型阅读（共6小题；每小题1分，满分6分） Some birthday customs are quite similar in many parts of the world---- birthday candles(蜡烛), birthday games，and birthday cakes. But some customs are more specific to certain countries. Here are some children talking about their customs. Linda---I am fourteen. I come from Aruba. In our country,Children take something special to school for their classmates and all teachers. Each teacher gives the birthday child a small gift like a pencil, an eraser or a postcard. The birthday child is also allowed to wear special clothes instead of the school uniform. Lucy---I am one year older than Linda. Denmark is my country. A flag is flown outside a window to show that someone who lives in that house is having a birthday. Presents are placed around the child's bed while they are sleeping so they will see them at once when they wake up. Tom---I am as old as Linda. I am from Brazil. The birthday child receives a pull on the earlobe(耳垂) for each year in my country. The birthday person also gives the first slice of cake to his/her most special friend or relative, usually mom or dad. 根据短文，完成下面表格，每空不超过4个单词，并将其答案写在答题卡中相应题号的横线上。
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