慢性阻塞性肺疾病康复的禁忌症包括()
A.合并严重肺高压
B.不稳定性心绞痛
C.近期心肌梗塞
D.认知功能障碍
E.近期脊柱损伤、肋骨骨折、咯血
参考答案:A, B, C, D, E
实验器材有电流表一个,量程为(0~0.6A,0~3A),电压表一个,量程为(0~3V,0~15V),滑动变阻器一个(1A,18Ω),电源一个(6V),若用以上器材测定阻值大约为6Ω的电阻,则:
(1)为了组成实验电路,除以上器材外,还需______一个,导线至少______条.
(2)电路中电流变化范围大约为______.
(3)现要求实验时,既不能使电流表、电压表的指针超过量程,又要连续几次测定数据时使电流表、电压表指针都偏过刻度盘中线,则电流表应使用______量程,电压表应使用______量程.
补全对话。
Clark: What events do you ____1____ at your school?
David: We have an English Speech Contest each year.
Clark: ____2____ is it?
David: It's March 5th.
Clark: Do you have ___3_____ Art Festival?
David: Yes. It's March 17th. ___4___ we have a basketball game on March 10th.
Clark: When is your School Trip?
David: It's April 6th.
Clark: Is Linda's birthday ___5___in April?
David: Yes. It's April 18th.