急性中毒时，下列哪种毒物中毒可用2％碳酸氢钠洗胃（）。 A.敌百虫中毒 B.硫酸中毒

This story is about a young man. He worked hard at his lessons. He was too busy. He didn’t have time to rest, so he was ill. Every night, when he went to bed, he closed his eyes and tried to sleep（睡觉）. But he couldn’t. He thought: “I must go to see the doctor.” He said to the doctor. “I can’t go to sleep at night.” “Try counting numbers. When you reach one thousand, you’ll be asleep.” The next day the man came back to the doctor’s office. “Well,” said the doctor, “How are you today?”

“Yes, he said,” I tried counting one, two, three. . . up to （直到）one thousand. But when I reached five hundred and sixty-nine, I began to feel sleepy (感到困倦). I had to get up and drank some tea. Then I went on counting up to one thousand. But I still couldn’t fall asleep.

小题1:The young man couldn’t go to sleep because ________ .

A．he didn’t finish his lessons

B．he worked too hard and was ill

C．he was worried about his homework

D．there was a lot of housework to do and he couldn’t have a good rest小题2:The doctor asked the young man ________ .

A．to count numbers before he went to bed

B．to put all numbers from 1 to 1000 together

C．to count numbers while he was lying in bed

D．to go to bed earlier小题3: The young man came back to the doctor’s office the next day because ___ .

A．he wanted to thank the doctor

B．he was better

C．he wanted to ask the doctor how to count the numbers

D．he still couldn’t go to sleep at night小题4:The young man ________ .

A．counted from 569 to 1000

B．counted from 1 to 569 and fell asleep

C．counted from 1 to 569 and got up to drink some tea

D．counted from 1 to 1000 and fell asleep小题5:The young man ________ in fact.

A．didn’t understand the doctor’s words.

B．couldn’t count numbers

C．didn’t try to sleep

D．wasn’t ill at all

在“测量小灯泡电功率”的实验中，小灯泡的额定电压为2.5伏，电阻大约为10欧，电源电压为6伏．

（1）图甲中已有部分电路联好，请用笔画线代替导线将电路连接完整．

（2）小明正确连接电路后，闭合开关，发现无论怎样调节滑动变阻器灯泡都不亮，小明分析后确定是灯泡的故障．若电流表没有示数，电压表有示数且接近电源电压，可以判断灯泡______；若电流表有示数，电压表几乎没有示数，可以判断灯泡______．

（3）故障排除后重新闭合开关，移动滑动变阻器滑片P到某一位置时，电压表的示数如图乙，若要测量小灯泡的额定功率，应将图甲中滑片P向______（填“A”或“B”）端移动，使电压表的示数为2.5伏；

（4）小金同学移动滑片P，记下多组对应的电压表和电流表的示数，并绘制成图丙所示的图象．根据图象信息，可计算出小灯泡的额定功率是______瓦．该图象不是直线，主要原因是______．

（5）完成实验后，该组同学又找来了几个不同阻值的电阻代替小灯泡继续“探究电压不变时，电流与电阻的关系”，得到的实验数据如表，该组同学做完第2次实验后，用15Ω的电阻代替10Ω的电阻，闭合开关后，应将滑动变阻器的滑片P向______端移动（选填“A”或“B”），使电压表的示数为______V，完成第三次实验．

胃食管返流患儿的手术指征（）。

A.内科治疗6～8周无效，有严重并发症

B.严重食管炎伴溃疡、狭窄

C.有严重的呼吸道并发症

D.合并严重神经系统疾病

E.有食管裂孔疝者

简述要约及其要件。

循环额度贷款通常是（）。

A、短期贷款

B、中期贷款

C、长期贷款

D、贷款期限不一定