如图,轰炸机沿水平方向匀速飞行,到达山坡底端正上方时释放一颗炸弹,并垂直击中山坡

题型:多选题

问题:

如图,轰炸机沿水平方向匀速飞行,到达山坡底端正上方时释放一颗炸弹,并垂直击中山坡上的目标A.已知A点高度为h,山坡倾角为θ,由此可算出(  )

A.轰炸机的飞行高度

B.轰炸机的飞行速度

C.炸弹的飞行时间

D.炸弹投出时的动能

考点:平抛运动
题型:多选题

动词填空 用括号内所给动词的适当形式填空,并将答案写在答题卡标有题号的横线上。(本大题共8小题,每小题1分,共8分)

小题1:It is known to all that paper __________ in China by Cai Lun long, long ago. (invent)

小题2:Li Qi put all his effort into ___________ singing and finally came first in the Voice of China.

(practice)

小题3:Could you tell me if the subway (地铁) _____________ in use in Wuxi in the near future. (be)

小题4:I didn’t go to see the film Lost In Thailand with other people last night for I ____________ it

twice. (see)

小题5:While the rich man _________ around the square, the kidnapping suddenly took place. (walk)

小题6:Will you be pleased if you______________ the job. (offer)

小题7:Files directed by Beijing TV Station ___________ many mysteries in history. (cover)

小题8:So far, Liu Shishi _________ in quite a few hot TV plays, so she is popular these days. (act)

题型:多选题

在我国,为保证特许经营权项目公司( )所需要的外汇,国 * * 证兑换和允许外汇出境。

A.货币交换

B.偿还贷款本金

C.支付利息

D.支付本金

E.支付红利

题型:多选题

价值工程中“价值”的含义是( )。

A.产品的使用价值

B.产品的交换价值

C.产品全寿命时间价值

D.产品功能与其全部费用的比较价值

题型:多选题

在从原点出发的射线与总成本曲线相切的产量上,必有()

A.平均成本值最小

B.平均成本=边际成本

C.边际成本曲线处于上升段

D.上述说法都对

题型:多选题

消防电梯间前室在首层设通道通向出口,其通道的长度不应超过( )。

A.10m
B.14m
C.20m
D.30m

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