The teacher finds teaching little Tom____爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

The teacher finds teaching little Tom_________ because he is too young. [ ]

A. frustrating

B. frustrated

C. frustrate

D. to frustrate

答案

答案：A

填空题

补充词语。

( )( )无能心急( )( ) ( )声( )色

( )( )走险 ( )言( )耳 ( )药( )口

填空题

H⁺交换器的出水呈（）性，Na⁺交换器出水呈（）性。