五、短文填词 Do you like friends who can teach you a lot every day? Books are s friends because they bring knowledge to us and keep us ____(陪伴) through our life. They are so valuable
用“/”给下面句子断句 子曰甚矣吾衰也久矣吾不复梦见周公
已知是三角形的内角，则“”是“”的 ( ▲ ) A．充分不必要条件 B．必要不充分条件 C．充要条件
56. Rocket to Space was written by __________. A. Diego Ramirez. B. Kitty Wolfe. C. Sam Mcgee. D. We don’t know. 57. Pet
Do your parents agree ________ you to be a actor? A. to B. that C. on D. with
一台理想降压变压器从10kV的线路中降压并提供200A的负载电流。已知两个线圈的匝数比为40:1，则变压器的原线圈电流、输出电压及输出功率是（
（1）右图所示是实验室中制取气体的一种简易装置。 ①请简述检验它的气密性的方法 。 ②利用右图所示装置可以制取
向上平移5个单位后的解析式为 .
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