探究“光对鼠妇生活的影响”实验中的实验变量是( )
A.光照
B.湿度
C.温度
D.空气
答案:A
So difficult _____ it to adjust to an English-speaking environment that he determined to learn English hard.
A.he has felt
B.has he felt
C.he did feel
D.did he feel
翻译:上乃欲变此,而某不量敌之众寡。