外国旅游者来华途中丢失行李,可向—索赔
A.境外组团社
B.有关航空公司
C.境内组团社
D.有关保险公司
参考答案:B
The smile on his face makes him ______ really ______. [ ]
A. looks, kind
B. look, kindly
C. to look, kindly
D. look, kind
曲线
的全部渐近线方程是______.