问题
选择题
The lesson Mr Li gave just now was too difficult for the class to ________.
A．take up
B．take out
C．take down
D．take in
答案
答案：D
D [take in(＝understand or remember)“领会，理解”。]
搜题请搜索小程序“爱下问搜题”
The lesson Mr Li gave just now was too difficult for the class to ________.
A．take up
B．take out
C．take down
D．take in
答案：D
D [take in(＝understand or remember)“领会，理解”。]
B
C，A的相对分子质量比B大2，C的相对分子质量比B大16，C能与A反应生成酯(C4H8O2)，以下说法正确的是 [ ]