若多项式2x3-8x2+x-1与多项式3x3+2mx-5x2+3相加后不含二次项

继发性腹膜炎放置引流管的指征是（）。

A.大量坏死组织无法切除

B.化脓性阑尾炎行阑尾切除术后

C.已形成局限性脓肿

D.坏死病灶已切除或穿孔已修补，预防发生渗漏

E.病灶切除后有少量渗血

某实验小组做“伏安法测量电阻”的实验，所用的器材有：电压为3V的电源，待测电阻R_x，以及符合实验要求的滑动变阻器、电流表、电压表、导线和开关．图（甲）是没有连接完整的实物电路．

（1）请你用笔画线代替导线将实物电路连接完整．

（2）在虚线框内画出相应的电路图．

（3）连好电路闭合开关前，应将滑动变阻器滑片P置于______端（选填“最左”或“最右”）．

（4）实验中，闭合开关，移动滑片．电流表有示数、电压表无示数．由此可以判断电路发生的故障是______．

（5）排除故障后进行实验，当电压表示数为2.4V时电流表的示数如图（乙）所示，这时电流为______A，他们利用此组数据即得出该待测电阻R_x的阻值，结束了实验．你认为他们这种做法有何不妥？答______．

给括号前的字注音（2分）

生活在敕（ ）勒草原上的游牧民族热情好客而又勇猛强悍，仁厚者狡黠（       ）者都是草原的朋友。但当歃（       ）血为盟的兄弟背叛了自己时，会毫不犹豫的援弓缴（       ）而射之。

阅读下面短文，简要回答所给问题。

To Protect the environment, China has put a ban on thin plastic bag (plastic bag thinner than 0.025mm) From June 1, 2008. China stopped the production, sale and use of these plastic bags to the public.

Plastic bags can cause “white pollution”, because they can take 400-1000 years to break down. They pollute the soil and water. Plastic bags also cause a serious danger to animals. Animals often mistake plastic bags for food. Thousands of them die each year after eating plastic bags.

So what kind of bags will be the best to use when we are shopping? Recently some students made their own shopping bags. Most students used old clothes to make their bags. They painted pictures like the Olympic rings on them. But Li Lei had a more traditional way to make her bag. She weaved（编织） a bamboo basket . It was not an easy job. With her grandfather’s help, Li Lei spent the whole afternoon making it .What can we do? Refuse plastic bags and persuade people to use environmentally shopping bags instead of plastic ones. Try to recycle the one we have .

小题1:Did Li Lei make her shopping bag by herself?

________________________________________

小题2:Why do plastic bags cause a serious danger to animals?

__________________________________________

小题3:What kind of material did most students use to make their shopping bags?

__________________________________________________________

小题4:When did China stop the production , sale and use of these plastic bags ？

____________________________________________________________

小题5:According to the passage, what should we do to protect the environment? (One example is OK.)

____________________________________________________________

如果要在VBA中打开一个窗体，可使用( )对象的OpenForm方法。

A．Form

B．DoCmd

C．Query

D．Report