小麦的真叶由叶片、叶鞘、（）、（）和叶枕组成。
参考答案：叶耳、叶舌
根据一张全家福的照片，你来介绍Lucy的家庭。
My family
Hello! I'm Lucy. There are seven people in my family. My grandpa and grandma are 1___________
. My aunt is a 2___________ . She likes singing. My uncle is an 3___________ .
He likes 4___________ . My mother is an 5___________ . My father is a writer. He likes painting, too. We are very happy.
脑梗死发生后，普遍认为脑缺血超早期治疗时间窗是（）
A.2小时内
B.3小时内
C.6小时内
D.12小时内
E.24小时内
. My aunt is a 2___________ 
. She likes singing. My uncle is an 3___________ 
. 
. My mother is an 5___________ 
. My father is a writer. He likes painting, too. We are very happy.