校验系数是评定结构工作状况的主要依据。( )
参考答案：对
根据句意、汉语意思及首字母提示补全单词。
l. Could you show me the _____(菜单), please?
2. I would like some _____(米饭) for my dinner.
3. Do you want to drink some _____(茶)?
4. The _____(粥) is very delicious.I want to have more.
5. When we have lunch, we always drink some _____．
为减小测量误差，对电流表和电压表的内阻要求是（）。
A、电流表内阻大，电压表内阻小
B、电流表内阻小，电压表内阻大
C、电流表和电压表内阻都小
D、电流表和电压表内阻都大
