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

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)

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

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

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

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