患者男性，16岁，病毒性心肌炎。心电图如图3-8-3所示，诊断为窦性心律，室性期前收

水资源丰富的地区不包括下列哪个地区？（   ）

A．南美洲北部

B．亚洲中部

C．亚洲东南部

D．非洲中西部

I still remember --- my hands and my fingers still remember --- what used to lie in store for us on our return to school from the holidays. The trees in the school yard would be in full leaf again and the old leaves would be lying around like a muddy sea of leaves.

“Get that all swept up!” the headmaster would tell us. “I want the whole place cleaned up, at once!” There was enough work there, to last over a week. Especially since the only tools with which we were provided were our hands, our fingers, our nails. “Now see that it’s done properly, and be quick about it,” the headmaster would say to the older pupils, “or you’ll have to answer for it!”

So at an order from the older boys we would all line up like peanuts about to cut and gather in crops. If the work was not going as quickly as the headmaster expected, the big boys, instead of giving us a helping hand, used to find it simpler to beat us with branches pulled from the trees. In order to avoid these blows, we used to bribe(贿赂) the older boys with the juicy cakes we used to bring for our midday meal. And if we happened to have any money on us, the coins changed hands at once. If we did not do this, if we were afraid of going home with an empty stomach or an empty purse, the blows were redoubled. They hit us so violently and with such evil enjoyment that even a deaf and dumb person would have realized that we were being whipped so much not to make us work harder, but rather to beat us into a state of obedience(服从) in which we would be only too glad to give up our food and money.

Occasionally one of us, worn out by such calculated cruelty, would have the courage to complain to the headmaster. He would of course be very angry, but the punishment he gave the older boys was always very small --- nothing compared to what they had done to us. And the fact is that however much we complained, our situation did not improve in the slightest. Perhaps we should have let our parents know what was going on, but somehow we never dreamed of doing so; I don’t know whether it was loyalty or pride that kept us silent, but I can see now that we were foolish to keep quiet about it, for such beating were completely foreign to our nature.

小题1:The statement “my hands and my fingers still remember” (Para.1) means that___________.

A．the author’s hands were severely injured in the cleaning up

B．the author seldom did such hard work as the cleaning up

C．the author was bullied by the big boys in the cleaning up

D．the author’s hands were his only tool for the cleaning小题2:The headmaster asked the older boys to_____________.

A．beat those who worked slowly

B．treat the small boys as peanuts

C．take charge of the process of the cleaning

D．do the cleaning all by themselves小题3:According to Para. 3, if the author had any money on him, he most probably_________.

A．gave it to the big boys so as to please them

B．gave it as a bride to the headmaster

C．spent it all on his midday meal

D．spent it buying midday meals for the big boys小题4:When receiving complaints, the headmaster would deal with the big boys by means of _________.

A．slight punishment

B．strict criticism

C．complete indifference

D．good beating

如图所示，质量为M的物体，在与竖直线成θ角，大小为F的恒力作用下，沿竖直墙壁匀速下滑，物体与墙壁间的动摩擦因数为μ，则物体受到的摩擦力大小的下列结论中正确的是

A．Mg－Fcosθ

B．μMg＋Fcosθ

C．μFsinθ

D．μ(Mg－Fcosθ)

简述保险公司的经营规则。

平均速度的数学表达式为（）。

A.V=ds/dt

B.V=H/t

C.Vi=ΔH/Δt