恶性骨肿瘤中不常有骨膜反应的是（） A.骨纤维肉瘤 B.尤文肉瘤 C.原发网状细胞肉

Go to Thailand(泰国)—it’s a great place to spend your holidays. I spent my last summer vacation in Thailand. It’s really a beautiful place to travel to. Thai people are very helpful. They helped me a lot during traveling. I enjoyed outdoor activities like swimming, biking and diving(潜水). All of these were wonderful. I visited many temples(寺庙)and learned about their history. Their history is very old and interesting. It’s very different from ours. I shopped at the special(特殊的)market. It’s on a river and everyone sells their goods(货物)from their boats. Thai food is delicious, too! I also learned a little Thai boxing(拳击) from their schools. You’ll love Thailand, too.

小题1:When did the writer go to Thailand?

A. last month               B. last week                C. last summer

小题2:How are Thai people?

A. They’re friendly.           B. They’re excited.            C. They’re strange.   

小题3:Their history is _____.

A. short and interesting        B. long and interesting     C. old and boring

小题4:Where did the writer shop?

A. In a supermarket         B. In a bookstore           C. In a boat market

小题5:Which of the following is NOT TRUE(不正确)?

A. The write didn’t learn their history.

B. The write did a lot of outdoor activities such as swimming and diving.

C. The write also learned some Thai boxing.

全面实施科教兴国战略，包括下列哪些内容( )

A．大力培养跨世纪创新人才

B．大力提高科技成果转化为现实生产力的能力

C．大力发展高新技术及其产业

D．加快建设国家创新体系

为了描绘额定电压为3.8V的某一导体（R_X）的伏安特性曲线。实验室可以提供的器材如下：

①直流电源E（电动势约4V，内阻可不计）；

②电流表A（量程为0—0.6A，内阻约0.5Ω）；  

③电压表V（量程0—5V，内阻约20kΩ）；

④滑动变阻器R₁（阻值0—10Ω，额定电流2A）；

⑤滑动变阻器R₂（阻值0—200Ω，额定电流1.5A）； 

⑥电键S及导线若干。

一同学实验测得的数据记录在下表中：

U/V	0	0.30	1.00	1.70	2.40	3.10	3.80
I/A	0	0.074	0.164	0.210	0.250	0.284	0.300

（1）请在坐标纸上根据测得的数据画出该导体的I—U图线。

（2）根据以上条件和得到的数据,符合要求的实验电路图是下面四个图中得哪一个？       应选择的滑动变阻器为（填写仪器符号）：         

  

（3）电压为1.50V时该导体的电阻值为        （结果保留2位有效数字）

设窗体上有一个名为List1的列表框，并编写下面的事件过程：
Private Sub List1_Click()
Dim ch As String
ch=List1. List(List1. ListIndex)
List1. RemoveItem List 1. ListIndex
List1. AddItem ch
End Sub
程序运行时，单击一个列表项，则产生的结果是( )。

A．该列表项被移到列表的最前面

B．该列表项被删除

C．该列表项被移到列表的最后面

D．该列表项被删除后又在原位置插入

在交流电路中，电容C1和C2并联C1为C2的3倍，则C1通过的电流为C2通过电流的（）。

A.1/3倍；

B.3倍；

C.1.5倍；

D.4倍。