飞机重量增加,飞机的失速速度()。A.减小 B.增大 C.不变

题型:单项选择题

问题:

飞机重量增加,飞机的失速速度()。

A.减小

B.增大

C.不变

考点:航空、航天科学技术航空、航天科学技术题库
题型:单项选择题

柴胡、薄荷均具有的功效是()

A.疏肝解郁

B.理气调中

C.化湿行气

D.消积行气

E.发散风寒

题型:单项选择题

It’s important for us to be healthy.But how can we keep healthy? First,you should eat fruit and vegetables three or four times a week.Then eat sonic tofu every day because it’s good for people,both the young and the old Milk is also necessary(必要的),especially for women.So you should have milk twice a day.It can help you to be strong Next,doing more exercises is better.You can do morning exercises or evening exercises.After supper you should take a walk.

小题1:You should eat ______ three or four times a week.

A.fruit and fish

B.vegetables and mutton

C.tom

D.fruit and vegetables小题2:Tofu is good for______.

A.young people

B.old people

C.young and old people

D.students小题3:Why do the people have milk?

A.It’s delicious.

B.It‘s a drink.

C.It‘s bad for you.

D.It can help you keep strong.小题4:You should have milk _______.

A.Four times a day

B.five times a wee

C.twice a day

D.twice a week小题5:The passage mainly tells us _____.

A.how to keep healthy

B.what health is

C.Why health is important

D.how often you can eat tofu

题型:单项选择题

跨度为8m混凝土设计强度等级为C40的钢筋混凝土简支梁,混凝土强度最少达到()N/mm2时才能拆除底模。

A.28 

B.30 

C.32 

D.34

题型:单项选择题

()沿着房屋墙基的一种种植形式,种植的植物高度一般低于窗台。

A、墙基种植

B、建筑装饰种植

C、基础种植

D、窗下种植

题型:单项选择题

一血友病男性患者的正常女儿与一正常男性结婚,预计所生的第一和第二个小孩都患血友病的概率为______。

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