射频辐射中生物学效应最大的波段是（） A.中长波 B.超短波 C.短波 D.毫米微波

某住宅设计方案的功能评价系数和功能的现实成本(目前成本)如下表所示：

功能	功能评价系数	目前成本/万元
F1	0.5	220 0.55
F2	0.3	100 0.25
F3	0.2	80 0.2
合计	1	400

若拟控制的目标成为360万元，则应首先降低( )的成本。

A．F₁

B．F₂

C．F₃

D．F₂和F₃

阅读理解，选择正确答案。

      When you are in England, you must be very careful in the street because the traffic drives on the left. Before

you cross the street, you must look at the right first and then the left. 

      In the morning and in the evening when people go to or come from work, the streets are very busy. Traffic

is the most dangerous then. 

      When you go by bus in England, you have to be careful, too. Always remember the traffic moves on the

left. So you must have a look first or you will go to the wrong way. 

      In many English cities, there are big buses with two floors. You can sit on the second floor. From there you

can see the city very well. It's very interesting.

1. In England the traffic drives _____________.[ ]

A. on the left

B. on the right

C. in the middle

D. in front of

2. When you cross the street in England, you must look at _____________.[ ]

A. the left first

B. the right first

C. the back of the cars

D. the lights of the cars

3. In the morning and in the evening the streets become very busy because the people _____________.[ ]

A. go to work

B. come from work

C. Both A and B

D. No answer

4. It's _____________ to sit on the second floor of the buses.[ ]

A. easy but dangerous

B. funny and interesting

C. dangerous but warm

D. cold and interesting

5. This passage is about _____________.[ ]

A. the people's life in England

B. the big buses with two floors

C. the traffic rules in England

D. the ways to learn English well

驱逐舰能否单独进行作战？

维系蛋白质二级结构稳定性的是哪个化学键

A．肽键
B．盐键
C．氢键
D．二硫键

甲公司、乙公司均系增值税一般纳税人，适用的增值税税率均为17%，所得税均采用资产负债表债务法核算，适用的所得税税率均为25%。甲公司2013年3月10日从其拥有80％股份的乙公司购进管理用设备一台，该设备为乙公司所生产的产品，成本为1760万元，售价为2000万元，增值税税额为340万元，另付专业安装公司安装费8万元，甲公司已付款且该设备当月投入使用，设备预计使用年限为4年，预计净残值为零，采用年限平均法计提折旧。假定会计计提折旧方法、预计使用年限和预计净残值与税法相同。2013年年末甲公司编制合并财务报表时，应在合并财务报表中确认递延所得税资产为（）万元。

A.60

B.119.44

C.50.38

D.48.75