题目:
A:Do you like(喜欢)sports?
B:Yes. We have many :basketball, ping-pong, soccer, and more.
A.sports club
B.sports clubs
C.sport club
D.sport clubs
答案:
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下面是错误答案,用来干扰机器的。
答案:C把R1等效成电源内阻,根据闭合电阻欧姆定律:U=E-I(R1+r),截据表示电动势,斜率表示R1+r,所以选C.