A:①③
B:①②④
C:②③④
D:①④
用显微镜观察英文字母“bd”时,视野里看到的图象形状是( )
将下列句子改为被动语态(1)I sent a letter to you last month.____(2) Do we use it for cooking?____(3) Where did you build the bridge?____(4) Mother tells me a story every day.____(5) Can he finish his homework on time?____
给下列词语中画线的字注音。
须臾____ 嘈杂____ 绰号____ 弥勒佛____ 哄堂大笑____