科学理论在现实世界中首先要有一个前提,才能有理论。
参考答案:对
Magaret was so ________ to hear any news of her lost son that she was almost driven mad.
A.relevant
B.annoyed
C.bound
D.dying
I _____as him because I think I _____ be wrong.[ ]
A. daren’t;must
B. dare;must
C. dare;mustn’t
D. daren’t;mustn’t