昴宿星团

在竖直向下的匀强磁场中，将一水平放置的金属棒PQ以初速度v₀水平抛出，如图所示．棒在运动过程中始终保持水平，空气阻力不计，那么，下列说法中正确的是(　　)

A．PQ棒两端的电势一定满足φ_P<φ_Q

B．PQ棒中的感应电动势越来越大

C．PQ棒中的感应电动势越来越小

D．PQ棒中的感应电动势保持不变

Mr. Brown first went to look at the underground-fire when he was seven. “Through the hole in the earth you could see the orange fire, but you had to look fast because it was so hot,” said Mr. Brown. In 1898,he saw the fire once more.

Now, we can only see the smoke. The fire Mr. Brown saw is not the underground-fire. In fact ,there are 260 coal fires in the world. They are harmful and dangerous. Then how to put them out?

Scientists have tried to set fire to underground coal to speed up the fires. In this way, the burning of underground coal would be soon finished.

小题1:Mr Brown said that we had to take a fast look at the fire because_________.

A．it was in the hole

B．it was very hot

C．it was orange

D．it was harmful小题2:How many coal fires are there in the world?

A．There’s only one

B．It’s hard to say

C．There are 260

D．The article doesn’t tell us小题3:What’s one of the best ways to put out the underground fire?

A．To cover the holes with stones

B．To speed the fire

C．To see the fire burning

D．To do some experiments小题4:What is the best title for the article?

A．Watching the Underground-fire

B．A Way to Put out the Underground Coat Fires

C．The Burning Earth

D．Coal and Coal Fires

注册会计师在对甲公司进行审计时，发现该公司内部控制制度具有严重缺陷。在此种情况下，注册会计师能否依赖下列证据： (1) 销货发票副本 (2) 监盘客户的存货 (3) 律师提供的声明书 (4) 管理当局声明书 (5) 会计记录 (6) 对行业成本变化趋势的分析

暂时性差异，是指资产的账面价值与其计税基础之间的差额，不包括负债的账面价值与其计税基础之间的差额。( )

电子温控型电冰箱压缩机不停机的原因一般是（）。

A、冷冻室温度过高

B、环境温度过高

C、控制继电器故障