铁路隧道主要开挖方法有()。
A.钻爆法
B.掘进机法
C.盾构法
D.全断面开挖法
E.明挖法
参考答案:A, B, C, E
看图填空,完成短文。
I have two pet dogs. Look at Vivi. She is white with black spots. She's very beautiful. Titi is a short
and fat dog, but he is very cute. He is __________ and __________ than Vivi. Vivi's legs are __________
than Titi's. But her head is __________ than Titi's. Titi is one year old. Vivi is two years old. Titi is __________
than Vivi. I love my dogs.
34位同学到公园划船.租船处有大小两种船,大船可以坐6人,小船可以坐4人,他们共租了7条船,刚好坐满且没有空位.他们租了大船______条、小船______条.