A.都不可导
B.至多有一个不可导
C.至少有一个可导
D.都可导
[判断题]A.对B.错
[单选题]A.0.44B.0.55C.0.62D.0.71
[单选题]A.酸性岩B.基性岩C.中性岩D.喷出岩
[单选题]A.60μFB.30μFC.60F
[单选题]A.缺牙间隙宽B.缺牙间隙窄C.D.E.
[单选题]A.B.C.D.