结构杆件所用材料在规定的荷载作用下，材料发生破坏时的应力称为（）。
A．爆裂度
B．张力
C．强度
D．极限度
参考答案：C
—How was the 2008 Beijing Olympic opening ceremony?
—________ that the whole world was attracted.
A．It was very fantastic
B．Such fantastic was it
C．So fantastic was it
D．So fantastic it was
单糖浆中的蔗糖浓度以g/g，g/m1表示应分别为
A．45%80%
B．55%75%
C．64.7% 85%
D．75%95%
E．85%65%
