根据《合同法》的规定,一切合同纠纷都可以用以下多少种条例来分析和判断()
A、有且仅有一条
B、有且仅有两条
C、至少三条以上
D、不定
参考答案:D
What on earth did you tell her? The _____ on her face suggested that she was very angry.
[ ]
A. impression
B. sight
C. appearance
D. expression
肠杆菌科的细菌血清学分群和分型的依据是()
A.O抗原和H抗原
B.K抗原和Vi抗原
C.O抗原和vi抗原
D.K抗原和H抗原
E.Vi抗原和H抗原