【多选题】于电流表的使用,下列说法中正确的是
A.
使用前如果电流表的指针没有指在表盘上的 “0” 点,要先进行调零
C.
当电路中的电流不能估计时,要用试触的方法来选定合适的量程
D.
绝不允许不经过用电器把电流表接到电源的两极上
【单选题】A The word 'hobby is an interesting word Every person has one thing he or she likes to do for fun Some people like to collect things like stamps or storybooks. Others like to play football or go windo...
B.
playing tennis with your friends
C.
something you enjoy doing
D.
something you can see at the window shopping
【简答题】Young____ he is, he knows what is the right thing to do. A. that B as C. although D. however
【判断题】详细了解用药史,重复用药或者药物相互作用,可能导致药物中毒。
【单选题】Young __________he is, he knows what is the right thing to do.
【判断题】风力发电机在保修期内,如风电场检修人员需对该风机进行参数修改等工作,需经的制造厂家同意
【简答题】设x1,x2,...是来自同一总体的随机变量序列,且它们的期望值存在,记为E(xi)=μ(i=1,2,...),则对于任意的ɛ>0,有 成立,这称之为______大数定律。