比较大小：（23）4______（34）2．
∵（23）4=642，（34）2=812，而642＜812
∴（23）4＜（34）2．
The purpose of new technology is to make life easier, _____ it more difficult. [ ]
A. not making
B. not make
C. not to make
D. nor to make
世界主要地震带分布。
