【单选题】如图所示电路中,电源电动势E1=E2=6V,内阻不计,R1=R2=R3=3 Ω ,则A、B两点间的电压是 ( )
【单选题】男性,头痛、发热、咳嗽、咖啡样痰、呼吸急促,诊断为大叶性肺炎,即用青霉素药物治疗,皮试阴性,用药后5分钟,患者胸闷、脸色苍白,冷汗淋漓,考虑青霉素过敏性休克,应立即选用何药抢救
【单选题】David is the first person ____when you get there [ 定语从句考点 ] A. you can talk to B. you can talk to whom C. whom you cantalk D. who you can talk
【简答题】-Do you know the man ______is talking with your father? -Yes, he’s our head. A. he B. who C. which D. whom 2. Is this the river _____I can swim? A. which B. in which C. that D. the one 3. This i...
【简答题】连线。 1. What time is it now? 2. Who wants to go shopping today? 3. What does he have? 4. Do you have ears? 5. May I take your picture? A. Sure! B. Yes,I do. C. It's 2:30. D. I do! E. He has a panda.
【简答题】如图所示的电路中,A,B两点间的电压是6V,电阻R1=4Ω,电阻R1两端的电压是2V,求:R1的电流强度和电阻R2的值。
【单选题】老年人高血压特点不包括:()
C.
老年人高血压常有不同程度的心、脑、肾等靶器官损害
【单选题】如题图所示电路中,电源电动势 E 1 =E 2 =6V,内电阻不计,R 1 =R 2 =R 3 =3Ω,则 A、B两点间的电压是( )。
【单选题】To tell you the truth, everyone, including me, won’t _____ your selfness and rudeness.
【单选题】关于儿童与青少年高血压的特点不正确的是:
A.
儿童高血压以原发性高血压为主,表现为轻、中度血压升高,与肥胖密切相关,50%以上的儿童高血压伴有肥胖.
B.
肾功能损害是儿童原发性高血压最突出的靶器官损害,占儿童高血压的10%~40%
C.
儿童中血压明显升高者多为继发性高血压,肾性高血压是继发性高血压的首位病因,占继发性高血压的80%左右。
D.
与成人血压测量不同,儿童与青少年常规测量坐位右上臂肱动脉血压。选择合适袖带对于儿童血压的准确测量非常重要,理想袖带的气囊宽度应至少等于右上臂围的40%,气囊长度至少包绕上臂围的80%,气囊宽度与长度的比值至少为1:2。