支承加劲肋进行稳定计算时,计算面积应包括加劲肋两端一定范围内的腹板面积,该范围是()。
A.A
B.B
C.C
D.D
参考答案:A
It' s Sunday morning. There are many people in the park, some boys are playing basketball. There are some girls under a big tree. They' re singing and dancing. What are those women doing? They are drinking tea. Look at the woman in a blue coat. Who' s she? She' s my mother. She is talking to Edward. Edward is her student. He is a good student. He studies hard . He' s good at all the subjects. And he' s friendly to all his teachers and his friends.
小题1:The boys are .
A.singing
B.playing basketball
C.dancing
D.drinking小题2: are under a big tree.
A.Some people.
B.Some women.
C.Some girls.
D.Some boys.小题3:My mother' s coat is .
A.blue
B.white
C.red
D.yellow小题4:My mother is .
A.a teacher
B.an office
C.a doctor
D.a woman小题5:Edward is in .
A.my home
B.the classroom
C.the zoo
D.the park
列车通过的风门,必须设有当列车通过时能够发出在风门两侧都能接收到()的装置。
A.闭锁信号
B.鸣笛信号
C.声光信号
D.信号