-Can I _____ your sister?
-Hold on, please. [ ]
A. speak
B. speak to
C. talk
答案:B
在阴天或傍晚进行移植,并去掉部分枝叶,是为了( )
A.降低光合作用
B.降低蒸腾作用
C.减少水分吸收
D.增加水分吸收