小题1:They were going to have a party last Saturday but ______ ______(决定不履行) at the last

minute.

小题2: _____(无论在什么地方) he may be, he will be happy.

小题3:In the end, it _____ _____ _____(归结为) two choices: you either improve your work or

leave.

小题4: I ______ the copy _____(与...比较) the original, but there was not much difference.

小题5:You can’t escape punishment.

=" You" can’t escape ______ _______.

小题6:The advanced scientific technology benefits us.

=" We" _____ _____ the advanced scientific technology.

小题7:He saved the drowning boy at the risk of losing his own life.

=" He" risked _____ _____ _____ to save the drowning boy.

单斜晶系的晶体常数的是（）

A.a≠b≠c，α=β=ｒ=90°

B.a≠b≠c，α=ｒ=90°，β≠90°

C.a≠b≠c，α=β=90°，ｒ＝90°