在电子电路中,电源输出最大功率的条件是内电阻等于()倍的外电阻。
A、0.5
B、1
C、2
D、4
参考答案:B
阅读理解。
What do you eat every evening? Do you eat meat? Do you eat vegetables? Do you eat fruit
or dessert(甜点) after dinner? We asked the 55 students of Class 1, Grade 7 in Sunshine School.
Here is the result(结果).
1. How many girls are there in Class 1, Grade 7?
A. Twenty.
B. Thirty-five.
C. Thirty.
D. Twenty-five.
2. All the students in the class eat for dinner.
A. meat
B. dessert
C. fruit
D. vegetables
3. In the class, 10 students don't eat for dinner.
我国《企业会计准则一基本准则》将公允价值界定为资产和负债按照在公平交易中,熟悉情况的交易双方自愿进行资产交换或债务清偿的金额。()