去甲肾上腺素静滴时间过长引起的最严重的不良反应是()
A.血压过高
B.静滴部位出血坏死
C.心率紊乱
D.急性肾功能衰竭
E.突然停药引起血压下降
参考答案:D
阅读理解。
One day Peter says to his mother, " Mum, everyone in our class says I have a big
head." Then he cries. " Don't listen to them, my son, you have a beautiful head." his
mother says. " Now, don't cry. Let's go to the shop and buy some apples for you." " But,
Mum, where's the bag? " Peter asks. "I don't have a bag." " Just use your big hat." His
mother says.
请根据短文内容判断正(T)误(F)。
( ) 1. Peter's classmates say Peter has a big head.
( ) 2. Peter's mother thinks Peter has a big head, too.
( ) 3. They want to go to shop for some fruits.
( ) 4. Peter's mother has a big hat.
( ) 5. Peter really has a big head.
两个电路元件A和B中的电流与两端电压的关系如图所示.
(1)由图可知,元件A的电阻为_________Ω.元件B电阻值的变化情况是_________.
(2)将A和B并联后接在电压为2.0V的电源两端,总功率为_________W.