2017年4.1中共中央、国务院印发通知，决定在河北国家级（  ）这是千年大计、国家大事 .

只用一种试剂就可将AgNO₃、KSCN、稀H₂SO₄、NaOH 四种无色溶液区分开，这种试剂是   (  )

教室内用来放映投影片的银幕，表面是白色且粗糙的，其目的是         （　　）

    This is my classmate. She's a girl. Her name is Jane. She's twelve years old. She's thin and tall. She has long and black hair. She has two big eyes and a small nose. She has a skirt. It's red. She has a pair of trousers, too. They are red. But her skirt is old. She wants to buy a new skirt. Look, what can she do? Oh, she can skip a rope. This is her rope. It's long. It's blue.