下列四条铁路线中没有穿过黄河的是:
A:京包线
B:包兰线
C:京广线
D:京沪线
认真观察如图所示的装置,回答下列问题:
— The trees __________ well, but I didn't water them.
计算:(1)12+1-8+3-10 (2)-12-1-313+1-20+12
duō suo
wéi qún
kù dōu
yìng bì
chú chuāng
pàn luàn
____